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1. Explain the benefit of letting the solutions of HCl(aq) and NaOH(aq) sit overnight. 2. When using the same graduated cylinder to measure the volumes of HCl(aq) and NaOH(aq), it is important to rinse the cylinder with water and a small amount of the second reactant before measuring the volume of the second reactant. Explain why this is important for this investigation. 3. Describe how to perform each of the following safely: diluting a strong acid solution with water dissolving a solid base in water adding a solution of base to a solution of acid

1. Explain the benefit of letting the solutions of HCl(aq) and NaOH(aq) sit overnight. 2. When using the same graduated cylinder to measure the volumes of HCl(aq) and NaOH(aq), it is important to rinse the cylinder with water and a small amount of the second reactant before measuring the volume of the second reactant. Explain why this is important for this investigation. 3. Describe how to perform each of the following safely: diluting a strong acid solution with water dissolving a solid base in water adding a solution of base to a solution of acid

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Please help me answer the 4 pre lab questions (Determining the ethalpy of neutralization reactions)

Determining the Enthalpy of a Neutralization Reaction As you have learned, the reaction between an acid and a base is often called a neutralization reaction. In a neutralization reaction, the acid is considered to counteract (or neutralize) the properties of the base, and the base counteracts the properties of the acid. As shown below, for a neutralization reaction between an Arrhenius acid and an Arrhenius base, the hydrogen ions from the acid, H*(aq), react with the hydroxide ions, OH (aq), of the base to produce water. The metal cation of the base and the anion from the acid combine to form a salt. HCl(aq) + KOH(aq) → HOH() + KCl(aq) In this investigation, you will study the reaction between a hydrochloric acid solution and a sodium hydroxide solution. This neutralization reaction is represented by the following equation: HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l) Using a simple calorimeter, you will determine the enthalpy change for this reaction. Pre-Lab Questions 1. Explain the benefit of letting the solutions of HCl(aq) and NaOH(aq) sit overnight. 2. When using the same graduated cylinder to measure the volumes of HCl(aq) and NaOH(aq), it is important to rinse the cylinder with water and a small amount of the second reactant before measuring the volume of the second reactant. Explain why this is important for this investigation. 3. Describe how to perform each of the following safely: • diluting a strong acid solution with water • dissolving a solid base in water • adding a solution of base to a solution of acid 4. If acid comes in contact with your skin, why must you flush the area with plenty of cold water, rather than neutralizing the acid with a base?
Transcribed Image Text:Determining the Enthalpy of a Neutralization Reaction As you have learned, the reaction between an acid and a base is often called a neutralization reaction. In a neutralization reaction, the acid is considered to counteract (or neutralize) the properties of the base, and the base counteracts the properties of the acid. As shown below, for a neutralization reaction between an Arrhenius acid and an Arrhenius base, the hydrogen ions from the acid, H*(aq), react with the hydroxide ions, OH (aq), of the base to produce water. The metal cation of the base and the anion from the acid combine to form a salt. HCl(aq) + KOH(aq) → HOH() + KCl(aq) In this investigation, you will study the reaction between a hydrochloric acid solution and a sodium hydroxide solution. This neutralization reaction is represented by the following equation: HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l) Using a simple calorimeter, you will determine the enthalpy change for this reaction. Pre-Lab Questions 1. Explain the benefit of letting the solutions of HCl(aq) and NaOH(aq) sit overnight. 2. When using the same graduated cylinder to measure the volumes of HCl(aq) and NaOH(aq), it is important to rinse the cylinder with water and a small amount of the second reactant before measuring the volume of the second reactant. Explain why this is important for this investigation. 3. Describe how to perform each of the following safely: • diluting a strong acid solution with water • dissolving a solid base in water • adding a solution of base to a solution of acid 4. If acid comes in contact with your skin, why must you flush the area with plenty of cold water, rather than neutralizing the acid with a base?
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