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champagneant871Lv1

11 Dec 2019

A solution of sodium acetate in water is observed to become more alkaline as the temperature is raised. Which conclusion can be drawn?. This is the equation for the reaction.

A. The forward reaction proceeds with the evolution of heat

B. The forward reaction proceeds with the absorption of heat

C. Acetic acid is less soluble in hot water than in cold water

D. At higher temperatures, will occur.

Please explain your answer?

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Kottherva SreevidyaLv10

17 Oct 2020

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Related questions

1. Complete and balance the following chemical reaction: NH4NO3(s) + H2O(l) --> ?

Given

2. Volume of DI water used 50 mL

3. Mass of DI water 50 g

4. Initial temperature of water, Ti 22.5Â°C

5. Mass of NH4NO3 3.0 g

6. Moles of NH4NO3 ________0.0375__________mol

7. Final temperature of water, Tf 18.9Â°C

8. change in temperature of the water (?T) -3.6 Â°C

9. calculate the heat associate with water, qH2O ___ ___-752.4_____________ J

m*c* deltaT = (50g)(4.184 J/g*k)(-3.6) = -752.4

10. the heat either released or absorbed by the reaction (?Hrxn) ________+752.4____________ J

Question: [Please notice the units]

11. Calculate the change in enthalpy (?Hrxn) for this reaction. _____________ kJ ??

12. Calculate the heat of reaction in kJ per mole of NH4NO3 ______________ kJ/mol ??

13. If the heat capacity of the calorimeter was 25 J/oC, what would the new change in enthalpy (?Hrxn) for this reaction be? (Use equation 7 to recalculate the value from #10) ____________________ kJ/mol ?? [Equation 7: - q(rxn) = q(soln) + q(calorimeter)

14. Is this an exo- or endothermic reaction? Explain the reasoning behind your choice. ??

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16. What is the percent error between your value and the value calculated from 13? What are some possible sources of error in the experiment?

__________________% error

An example: o oThe temperatures before mixing: NaOH solution Tb = 22.72 C o HCl solution Ta = 22.48 C.

The average temperature before mixing is: Ti = (Ta+ Tb)/2 = 22.60 C.To calculate the heat capacity of the calorimeter use Equation 2.

1. In this experiment you will measure the heat capacity of a calorimeter by mixing 50. mL of 1.0 M HCl solution with 50. mL of 1.0 M NaOH solution in the calorimeter. The heat capacity of the calorimeter is expected to be within the range 0 and 100. J/K.

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