Determining the Enthalpy of a Neutralization Reaction. In this investigation, you will study the reaction between...
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Determining the Enthalpy of a Neutralization Reaction. 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: HC1 (aq) + NaOH(aq) --> H2H (1) + NaCl (aq) Using a simple calorimeter, you will determine the enthalpy change for this reaction. Suggested Materials: 1.00 mol/L HC1 (aq) at room temperature 1.00 mol/L NaOH(aq) at room temperature simple calorimeter (two nested polystyrene cups in a 250 mL beaker, with a two holed polystyrene lid) 100 mL graduated cylinder thermometer (alcohol or digital) stirring rod 1. A detailed procedure is crucial for performing this investigation. Make sure to include all safety precautions that must be followed. 2. Record a table to record the observations, decide at what time intervals you will record your observation 3. Calculate the quantity of thermal energy absorberd by the solution in the calorimeter and the quantity of thermal energy released by the reaction, state any assumptions you made in order to carry out your calculations 4. Calculate the amount in moles of HC1 (aq) and of NaOH (aq) involved in the reaction 5. Use the answer to questions 1 and 3 to calculate the AH for the given neutralization reaction, in unit of kilojoules per mole of the limiting reagent. (If HCI (aq) and NaOH(aq) are present in the equimolar amounts, either one can be considered to be the limiting reagent.) 6. Is the neutralization reaction exothermic or endothermic? What is the sign-positive or negative- of AH? 7. Write the thermochemical equation for the neutralization reaction 8. Discuss possible sources of error for this investigation, which could have contributed to the discrepancies between values determined within your class and between your value and the reported value. 9. Write the thermochemical equation for the neutralization HCI (aq) using solid sodium hydroxide, NaOH (s), instead of NaOH (aq). Would you expect the AH value to differ from that obtained using NaOH (aq)? Explain briefly. Determining the Enthalpy of a Neutralization Reaction. 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: HC1 (aq) + NaOH(aq) --> H2H (1) + NaCl (aq) Using a simple calorimeter, you will determine the enthalpy change for this reaction. Suggested Materials: 1.00 mol/L HC1 (aq) at room temperature 1.00 mol/L NaOH(aq) at room temperature simple calorimeter (two nested polystyrene cups in a 250 mL beaker, with a two holed polystyrene lid) 100 mL graduated cylinder thermometer (alcohol or digital) stirring rod 1. A detailed procedure is crucial for performing this investigation. Make sure to include all safety precautions that must be followed. 2. Record a table to record the observations, decide at what time intervals you will record your observation 3. Calculate the quantity of thermal energy absorberd by the solution in the calorimeter and the quantity of thermal energy released by the reaction, state any assumptions you made in order to carry out your calculations 4. Calculate the amount in moles of HC1 (aq) and of NaOH (aq) involved in the reaction 5. Use the answer to questions 1 and 3 to calculate the AH for the given neutralization reaction, in unit of kilojoules per mole of the limiting reagent. (If HCI (aq) and NaOH(aq) are present in the equimolar amounts, either one can be considered to be the limiting reagent.) 6. Is the neutralization reaction exothermic or endothermic? What is the sign-positive or negative- of AH? 7. Write the thermochemical equation for the neutralization reaction 8. Discuss possible sources of error for this investigation, which could have contributed to the discrepancies between values determined within your class and between your value and the reported value. 9. Write the thermochemical equation for the neutralization HCI (aq) using solid sodium hydroxide, NaOH (s), instead of NaOH (aq). Would you expect the AH value to differ from that obtained using NaOH (aq)? Explain briefly.
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Related Book For
Fundamental Managerial Accounting Concepts
ISBN: 978-1259569197
8th edition
Authors: Thomas Edmonds, Christopher Edmonds, Bor Yi Tsay, Philip Olds
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