The solubility of the substances. Write the total ionic equation for the reaction between Ba(OH)_2 (aq) and HCl (aq). Write a balanced chemical equation for each step of the process. The above equation is balanced i.e. Write the balanced equation for the reaction. A chemical reaction occurring between acidic and basic compounds is known as an acid-base reaction, identified by an exchange of one or more hydrogen ions between the species involved. Write a balanced reaction for each case. Net Ionic Equation It's best to first write the complete formula equation, balance it, then pull everything apart that is soluble into its ions and get the complete Ionic equation. 20.0 cm3 of a 0.400 mol dm3 solution of sodium hydroxide was exactly neutralised by 25.25 cm3 of sulfuric acid. 2005 - 2023 Wyzant, Inc, a division of IXL Learning - All Rights Reserved, Drawing Cyclohexane Rings Organic Chemistry. Strontium hydroxide will neutralize hydrochloric acid to produce a salt and as observed from the stoichiometry (or balanced equation). Call for information on other items (423) 477-0018 Write the balanced equation for the reaction that occurs between strontium hydroxide and perchloric acid to form strontium perchlorate and water. 2Sr(OH)_2 \longrightarrow 2SrO + 4H_2O b. Sr(OH)_2 \longrightarrow SrO + H_2O c. 2Sr(OH)_2 \longrightarrow 2Sr + 2H_2O d. 2SrOH_2 \longrightarrow 2SrO + H_2O, a) Nitric acid reacts with strontium hydroxide producing soluble strontium nitrate and water. Making educational experiences better for everyone. Strontium nitrate and sulfuric acid equation Thread starter sunbuster; Start date Apr 2, 2011; Apr 2, 2011 #1 sunbuster. Write a balanced equation for the following neutralization reaction. Worked example 3: For the reaction between magnesium and hydrochloric acid construct a balanced equation and an ionic equation. Count the number of atoms of each element on each side of the equation and verify that all elements and electrons (if there are charges/ions) are balanced. Write a balanced equation, total ionic equation, and net ionic equation for this reaction. Most questions answered within 4 hours. Our experts can answer your tough homework and study questions. Create an equation for each element (Sr, O, H, Cl) where each term represents the number of atoms of the element in each reactant or product. Question: Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. Include the phase of each species molecular equation: 2HCl (aq) + Sr (OH)2 (aq)2H2)+SrCI (aq) net . This calculator is used to determine the mass from the volume and density, and show a conversion scale from volume to mass centred around each calculation. Balance the equation HCl + NaOH = NaCl + H2O using the algebraic method. 1. Carbon, Is heat transfer to or from the fluid desirable as it flows, In Exercises find any relative extrema of the function. Hydrochloric acid = HCl. hydrogen chloride (HCl), a compound of the elements hydrogen and chlorine, a gas at room temperature and pressure. If you're struggling in math class, this is the app to help you. J.R. S. The net ionic equation for the dissolution of zinc metal in hydrobromic acid is as follows: Zn (s) + 2H+ (aq . Write a molecular equation and net ionic equation for the reaction between magnesium hydroxide and chloric acid? Sr(OH)2 + HCl = SrCl2 + H2O might be a redox reaction. When barium fluoride reacts with sulfuric acid, barium sulfate and hydrofluoric acid are produced. Give the reaction of ammonium hydroxide with the following metals: Fe3+ and Mn2+. Why do people say that forever is not altogether real in love and relationship. In the case of hydroiodic acid reacting with lithium hydroxide, what would be the net ionic equation? 25.0 cm 3 of a solution of strontium hydroxide was exactly neutralised by 15.00 cm 3 of 0.100 mol dm -3 hydrochloric acid. Sr(OH) 2 + 2 HCl SrCl 2 + 2 H 2O Names: Strontium hydroxide, Sr(OH)2, Strontium hydroxide anhydrous Appearance: Prismatic colourless crystals |, How to round up to nearest million in excel, Solving system of equations by multiplication calculator. Strontium hydroxide ({eq}\rm{Sr(OH)_2} Once you have the correct answer, double check it to be sure. Hydrogen chloride may be formed by the direct combination of chlorine (Cl2) gas and hydrogen (H2) gas; the reaction is rapid at temperatures above 250 C (482 F). When a hydrochloric acid solution is combined with a potassium hydroxide solution, an acid-base reaction occurs. To clear up a math equation, work through each step of the equation slowly and carefully. Number Balance Ideal for teaching many math concepts. hydrochloric acid will neutralize one mole of sodium hydroxide, producing salt and From the balanced chemical equation find the mole ratio. sodium carbonate and iron ii chloride ionic equation. Label Each Compound With a Variable. When HCl reacts with calcium hydroxide, what is the formula of the salt formed? What is the net ionic equation for the neutralization between ammonium hydroxide and hydrochloric acid? What volume of concentrated HCl is required to prepare 2.50 L of 2.20 M HCl solution? HCl + Ca(OH)2 arrow. The net ionic equation will be, Advertisement . Clear up mathematic equation. 5. Sr (OH) 2 + 2HCl SrCl 2 + 2H 2 O. molecular equation. Write the chemical equation, the ionic equation, and the net ionic equation for the following reaction. Using the Math Balance, students can also gain insights into . Strontium nitrate reacts with Potassium iodate. X + 2HCl XCl 2 + H 2. Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. For the molecular equation identify the reaction as either an acid-base reaction, write the total ionic and net ionic equation. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. What is the net ionic equation for the reaction of H_2SO_3 with Ba(OH)_2? SOLVED: Write the balanced molecular equation and net ionic. Balance the equation Sr(OH)2 + HCl = SrCl2 + H2O using the algebraic method or linear algebra with steps. Give the balanced reaction equation. 1. The balanced equation will appear above. Strontium Hydroxide - Sr(OH)2. Write the net ionic equation for the reaction between chromic acid and rubidium hydroxide. Copyright 2023 SolutionInn All Rights Reserved. If you're struggling with your math homework, our Math Homework Helper is here to help. b. Solved and balanced chemical equation 2 HCl + Sr(OH)2 2 H2O + SrCl2 with completed Names: Strontium hydroxide source: wikipedia, accessed: 2019-09-27, Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. Why was the decision Roe v. Wade important for feminists? Write the balanced equation for the reaction. The company, 20.0 cm 3 of a metal hydroxide of concentration 0.0600 mol dm, a. Expert Answer. Reactants. Strontium Hydroxide - Sr(OH)2. Label each compound (reactant or product) in. What is the reaction with sodium hydroxide for the following metals: Al3+, Fe3+, Mn2+, Ni2+, Zn2+? It is also the reason that carrots are said to be good for your eyesight. The chemical formula of strontium hydroxide is . The best way to download full math explanation, it's download answer here. Write the balanced equation for the acid-base reaction that occurs between sulfuric acid and lithium hydroxide. This app works so well, definitelty recommend, and it helps me with my modules, fast and easy to navigate, gets straight to the point and in a way helps you figure out your own question and then answers it. Write the balanced formula equation for the acid-base reactions that occur when the following are mixed. dilute sulfuric acid + strontium h. Rubidium reacts explosively with water, but strontium merely fizzes. Write a balanced reaction for the neutralization of HBr upon the addition of KOH. 2HNO_3 (aq) + 6HCl (aq) + 3Fe (s) to 3FeCl_2 (aq) + 2NO (g) + 4H_2O (I), For the molecular equation identify the reaction as either an acid-base reaction, write the total ionic and net ionic equation. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. The reaction, represented by the equation H2 + Cl2 . Calculate the concentration, in mol dm3, of the sulfuric acid. If it is not correct, write the proper equation for the acid-base reaction between the pair. Math can be confusing, but there are ways to make it easier. Write a balanced equation for the following neutralization reaction. Check out our list of instant solutions! For Free. answered 12/03/19, Ph.D. University Professor with 10+ years Tutoring Experience, 2HCl(aq) + Sr(OH)2(aq) ==> SrCl2(aq) + 2H2O(l) molecular equation, 2H+(aq) + 2OH-(aq) ==> 2H2O(l) net ionic equation. A solution of hydrochloric acid is mixed with a solution of calcium hydroxide. What is the reaction between copper(II) sulfate and barium hydroxide? A solution of the gas in water is called hydrochloric acid. So, the net ionic equation of sulfuric acid and sodium hydroxide, after crossing out . Write a balanced ionic equation for this acid-base reaction: 2CsOH(aq)+H_2SO_4(aq)\rightarrow; Write the total ionic equation for the reaction between Ba(OH)_2 (aq) and HCl (aq). Use substitution, Gaussian elimination, or a calculator to solve for each variable. A teacher walks into the Classroom and says If only Yesterday was Tomorrow Today would have been a Saturday Which Day did the Teacher make this Statement? SuhaE120102 SuhaE120102 . What is the net ionic equation for this reaction? One way is to clear up the equations. What concentrati, What is the net ionic equation for the reaction between lithium hydroxide and hydrobromic acid? So, the total ionic equation is, This is a good app. What is the concentration of the strontium hydroxide solution? For the acid base neutralization reaction of carbonic acid, H_2CO_3(aq), and lithium hydroxide, LiOH(aq), write the balance: a.) What are the answers to studies weekly week 26 social studies? Let's begin. Strontium phosphate reacts with sulfuric acid, H2SO4, to form strontium sulfate and phosphoric acid, H3PO4. Sr(II) is precipitated by ammonium oxalate. With clear, concise explanations and step-by-step examples, we'll help you master even the toughest math concepts. All rights reserved. 35,000 worksheets, games, and lesson plans, Spanish-English dictionary, translator, and learning, a Question About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright . Write a balanced chemical equation for each of the following reactions: a. Calcium hydroxide + phosphoric acid ----- calcium phosphate + water b. Strontium + oxygen gas ----- strontium oxide c. Magnesium chlorate ----- magnesium chloride + oxygen gas What is are the functions of diverse organisms? Write an equation for the dissolution of HCI, NHAOH, and CH3C COzH (acetic acid) in water:SavedNormalB / I i4 X2 | X| _ fx1 8 1 [email protected] . Hydrochloric acid and strontium hydroxide balanced equation can be a useful tool for these scholars. h(x) = arcsin. Enter no reaction if no precipitate is formed.). Write the balanced equation for the neutralization of HBr by Ca(OH)2. What is the balanced molecular equation for this reaction? Solved and balanced chemical equation 2 HCl + Sr(OH)2 2 H2O + SrCl2 with completed Names: Strontium hydroxide source: wikipedia, accessed: 2019-09-27, Sr(OH) 2 + 2 HCl SrCl 2 + 2 H 2O Names: Strontium hydroxide, Sr(OH)2, Strontium hydroxide anhydrous Appearance: Prismatic colourless crystals |. What is the balanced equation for this reaction? the number of the Na, H, O, and Cl atoms on the reactant and product sides are equal. How do you write the overall, ionic and net ionic equations for the following reaction: Hydroiodic acid (HI) and calcium hydroxide (Ca(OH)_2)? Strontium reacts slowly with water, forming strontium hydroxide, Sr(OH). Question: Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. [ Check the balance ] Strontium hydroxide react with hydrogen chloride to produce strontium chloride and water. The proposed procedure is applicable to rocks containing from 50 to 2000 p.p.m. Examples: Fe, Au, Co, Br, C, O, N, F. Ionic charges are not yet supported and will be ignored. 1) -carotene (C H 4 ) is the chemical that gives carrots their orange color, It is also the reason that carrots are said to be good for your eyesight. 2HBr(aq) + Ca(OH)_2 (aq) to CaBr_2 (aq) + 2H_2 O(I). Complete and balance the following acid-base reaction. Write the balanced molecular equation and net ionic equation for the neutralization reaction between. Exactly 45.00 mL of an aqueous solution of strontium hydroxide required 32.0 mL of 0.200 M hydrochloric acid to neutralize it. The neutralization reaction between Al(OH) 3 and HNO 3 produces a salt with the formula Al(NO 3 ) 3 + H 2 O. Hydrochloric acid plus barium hydroxide yields barium chloride plus water. Hydrochloric acid and calcium hydroxide balanced equation. By taking the time to explain the problem and break it down into smaller pieces, anyone can learn to solve math problems. What is the net ionic equation for the reaction that occurs between nitrous acid and strontium hydroxide? H_2SO_4 (aq) + Ca(OH)_2 (aq) to 2H_2O (I) + CaSO_4 (s). What is its molecular, ionic and net ionic equations? Do you need an answer to a question different from the above? Write the total ionic equation for the reaction of lithium hydroxide (LiOH) with hydrochloric acid (HCI). This app is so much fun because it helps me with a lot of math problems ''. What is the net ionic equation for magnesium hydroxide + chloric acid? hydrochloric acid HCl | Cl2H2 | CID 21225539 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities . The full solution can be found here. Write the neutralization reaction that occurs between HCl and LiOH? For the neutralization reaction of lithium hydroxide (LiOH) with hydrochloric acid (HCl), write the total ionic equation (also known as the complete ionic equation). If you need help with your homework, our expert writers are here to assist you. charged anion, so to balance the charge of the strontium two Consider the reaction that occurs when perchloric acid and calcium hydroxide are combined. 2HCl(aq) + Sr(OH)2(aq) == SrCl2(aq) + 2H2O(l) molecular equation. NaOH:HCl Average satisfaction rating 4.7/5 b) Sulfuric acid reacts with rubidium hydroxid. {/eq}) and water ({eq}\rm{H_2O} The equation for the reaction of strontium hydroxide with, Complete the equation for the reaction of, The balanced equation for the reaction of aluminum metal and chlorine gas, Give the proper formula for each name. What is the sum of the coefficients of the balanced equation for this reaction? A lab technician needs one liter of 0.250 M HCl. Write the equation for the preparation of calcium hydroxide. You can always count on our team for reliable support. Calcium hydroxide neutralizes perchloric acid. steel, sodium hydroxide (caustic soda) used for making soap, ammonia used for making fertilizers as well as explosives, sodium trioxocarbonate (iv) for making glass, detergents, paper, and removing hardness in water, etc. The correct option is A. 10 0. A 25.00 mL sample of strontium hydroxide solution is placed in a flask. What is the correctly balanced chemical equation for the neutralization reaction between HClO4 (perchloric acid) and LiOH (lithium hydroxide)? Check your work as you go to identify any mistakes. Acid-base reactions can also be considered neutralization reactions. The equation for the reaction of strontium hydroxide with hydrochloric acid is shown below. Write the chemical equation, the ionic equation and the net ionic equation for the reaction between caesium hydroxide and hydrobromic acid. The digest is aspirated into an 8,000 K argon plasma where resulting light emission is quantified for 30 elements simultaneously. Math Methods . Understand the reaction between acid and base, the neutralization reaction, the definition, and see the products. Write the balanced neutralization reaction between H_2 SO_4 and KOH in aqueous solution. What is the net ionic equation for the reaction that occurs between nitrous acid and strontiun hydroxide ? molecular equation 2HCl + Sr(OH) 2 = SrCl 2 + 2H 2 O (SrCl 2 is precipitate) ionic equation 2H + + 2Cl - . Sodium hydroxide solution (in water) reacts with hydrochloric How To Balance HCl + NaOH = NaCl + H2O. It breaks down and explains how to solve the problem and even offer various ways to sovle. Ionic equation, c.) Net ionic equation. Choose an expert and meet online. The most complicated molecule here is C 2 H 5 OH, so balancing begins by placing the coefficient 2 before the CO 2 to balance the carbon atoms. Potassium hydroxide + Hydrochloric acid This the equation for the reaction: HCl + KOH KCl + H2O This is a neutralisation reaction where KCl (a salt) and water are formed. Language . The balanced equation will appear above. In the reaction between strontium hydroxide and hydrobromic acid, what are the two products? Balanced equation for sodium hydroxide and hydrochloric acid - NaOH(aq)+HCl(aq)NaCl(aq)+H2O(l). Doing mathematical equations can be very rewarding. Write the balanced molecular equation, complete ionic equation, and net ionic equation for the reaction that occurs when chloric acid and iron(III) hydroxide are mixed. 0.233 mol of strontium hydroxide is added to a 5.00 M solution of hydrochloric acid in a neutralization reaction that produces water and strontium chloride? Reactants. This type of reaction where a base reacts with the acid is called a neutralisation reaction. Write the balanced molecular equation for neutralization reaction between hydrochloric acid and strontium hydr Get the answers you need, now! At the end of Ehlinger Department Stores fiscal year on December 31, Graydon, Inc. manufactures food blending machinery according to customer specifications. Get access to this video and our entire Q&A library, The reaction between strontium hydroxide and chloric acid produces. Strontium is a divalent cation, and hydroxide is a singly charged anion, so to balance the charge of the strontium two hydroxide ions are required. Write a balanced chemical equation for the following: Iron(III) hydroxide neutralizes hydrobromic acid. Math is often viewed as a difficult and boring subject, however, with a little effort it can . Solve word queries. Replace immutable groups in compounds to avoid ambiguity. Calculate the concentration, in mol dm 3 , of the following, Many universities have outsourced operations of residence halls. At this time we are only buying limited items: Gold, Silver, Bullion, Coins, Jewelry, Ammo. Hydrochloric acid and ammonium hydroxide balanced equation. order now Sr(OH)2(aq) + 2HCl(aq) = SrCl2(aq) + 2H2O(l) might be an ionic equation. 2HCl(aq) + Sr(OH)2(aq) == SrCl2(aq) + 2H2O(l) molecular equation. 1) Hydrochloric acid reacts with barium hydroxide according to the following UNBALANCED reaction: HCl + Ba(OH)2 H2O + BaCl2 2) You are titrating HCl with Ba 24/7 Live Expert If you need help, our customer service team is available 24/7. Strontium hydroxide = Sr(OH)2. { sidte ko fishnt } acid soil [GEOL] A soil with pH less than 7; results from presence of exchangeable hydrogen and aluminum ions. Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide, Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. Write the balanced NET IONIC equation for the reaction that occurs when perchloric acid and calcium hydroxide are combined. Chemical reaction. Write the balanced equation for the reaction that occurs between strontium hydroxide and perchloric acid to form strontium perchlorate and water. Hydrochloric acid and Ammonia. By Smruti Bhosale. Experts will give you an answer in real-time, Sr(OH) 2 + 2 HCl SrCl 2 + 2 H 2O Names: Strontium hydroxide, Sr(OH)2, Strontium hydroxide anhydrous Appearance: Prismatic colourless crystals |, Sr(OH)2 + HCl = SrCl2 + H2O might be a redox reaction. {/eq}) react with each other to form strontium chlorate ({eq}\rm{Sr(ClO_3)_2} Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. Balance the acid-base neutralization reaction for hydrobromic acid and sodium hydroxide. Calcium hydroxide can be used as an antacid to neutralize HCl, the acid found in the stomach. The extent of this reaction is: rule{1cm}{0.15mm}. Perchloric acid and calcium hydroxide. Magnesium hydroxide is commonly used as an antacid, with barium, calcium, and strontium hydroxide are not. 2NaBr (aq) + Cl_2 (g) rightleftharpoons 2NaCl (aq) + Br_2 (I). smluke2000. Write a balanced equation for the following neutralization reaction. What are the 4 major sources of law in Zimbabwe? of niobium , and, with modifications, can be used on rocks containing . Sr(II) is precipitated by sulfate ions at neutral or slightly acidic solutions. Balancing chemical equations. Write the balanced formula unit equation, the total ionic equation, and the net ionic equation for this reaction. Calculate the net ionic equation for Sr(OH)2(aq) + 2HCl(aq) = SrCl2(aq) + 2H2O(l). What is the correctly balanced chemical equation for the neutralization reaction between H2C3H2O4 (malonic acid) and LiOH (lithium hydroxide)? Include the, 3d shapes and their faces edges and vertices, Adding and subtracting rational numbers free calculator with step by step solution, Convolution theorem laplace transform calculator, Find all real and complex roots of the equation z^10 = 9^10, How to factor quadratic equations quickly, Solve second order partial differential equation, Unit 6 homework 3 proving triangles similar answers. Thermodynamic properties of substances. NH4OH aqueous plus HCl aqueous reacts to form NH4Cl aqueous plus H2O liquid. Also known as oxygen ratio. I don't have smart friends, but I do have a smart phone with This app installed on it and that works for me! (OH) 2 + H 2 SO 4 SrSO 4 + 2H 2 O [ Check the balance ] Strontium hydroxide react with sulfuric acid to produce strontium sulfate and water. Write a balanced equation for the reaction between strontium metal and water. wrote. In this video we'll balance the equation HCl + Sr(OH)2 = H2O + SrCl2 and provide the correct coefficients for each compound.To balance HCl + Sr(OH)2 = H2O + SrCl2 you'll need to be sure to count all of atoms on each side of the chemical equation.Once you know how many of each type of atom you can only change the coefficients (the numbers in front of atoms or compounds) to balance the equation for Hydrochloric acid + Strontium hydroxide.Important tips for balancing chemical equations:Only change the numbers in front of compounds (the coefficients).Never change the numbers after atoms (the subscripts).The number of each atom on both sides of the equation must be the same for the equation to be balanced.For a complete tutorial on balancing all types of chemical equations, watch my video:Balancing Equations in 5 Easy Steps: https://youtu.be/zmdxMlb88FsMore Practice Balancing: https://youtu.be/Qci7hiBy7EQDrawing/writing done in InkScape. Write a balanced equation for the reaction of Malonic acid with KOH. 3. In a world where we can get answers to our questions faster than ever before, it's important to have a source that can give us the information we need quickly and accurately. Math can be confusing, but there are ways to make it easier. a. strontium bromide and water b. strontium bromine and water c. strontium hydrobromide and water d. strontium and water. A chemist finds a strontium hydroxide solution in lab, but the concentration of this solution is . a. The first step is the decomposition of solid calcium carbonate from seashells to form solid calcium oxide and gaseous carbon dioxide. What is the Net ionic equation for the dissolution of zinc metal in hydrobromic acid? Reactions with dilute hydrochloric acid. Hydrochloric acid = HCl. It takes the addition of 30.00 mL of0.2695 M HCl to; Question: Write a balanced equation for the neutralization of aqueous strontium hydroxide with aqueous hydrochloric acid. The chemical formula of strontium hydroxide is therefore Label Each Compound With a Variable. Example #3 (Complex) C 2 H 5 OH + O 2 = CO 2 + H 2 O. Calculate the concentration, in mol dm -3, of the strontium hydroxide solution. Use uppercase for the first character in the element and lowercase for the second character. Write a balanced chemical equation for the reaction that occurs when strontium carbonate decomposes into strontium oxide and carbon dioxide. Find the molecular, total ionic, and net ionic equation for the aqueous reaction between strontium Write a chemical equation to show the neutralization of sulfuric acid by calcium hydroxide. 1) we have below given equation 2 HCl (aq) + Sr (OH)2 (aq) --> SrCl2 (aq) + 2 H2O (l) Answer: 2 HCl (aq) + Sr (OH)2 (aq) --> SrCl2 (aq) + 2 H2O (l) 2) Total io . Strontium Hydroxide - Sr(OH)2. Write the balanced molecular equation and net ionic equation for the neutralization reaction between hydrochloric acid and strontium hydroxide. A) Write a balanced equation for the reaction. A is sodium sulfate reacting with potassium chloride? What are the molecular equation, ionic equation, and net ionic equation for the following reaction? Calculate the concentration, in mol dm3, of the strontium hydroxide solution. When iron(III) hydroxide is combined with carbonic acid, what are the products? Strontium dissolves readily hydrochloric acid, forming Sr(II) . The equation for the reaction is: Search Textbook questions, tutors and Books, Change your search query and then try again. Periodic table of elements. Sr (OH) 2 + 2HCl SrCl 2 + 2H 2 O. 1. Reactants. Use the calculator below to balance chemical equations and determine the type of reaction (instructions).