Heat of Neutralization of a Strong Acid and a Strong Base
1. Thoroughly clean the calorimeter with several rinses of distilled water.
2. Measure 25.0 mL of 2.00 M hydrochloric acid and pour into the calorimeter.
3. Measure 25.0 mL of 2.00 M sodium hydroxide. Transfer this solution into a dry 100-
mL beaker.
4. Measure and record the temperature of the acid and the base, making sure to rinse
and dry the thermometer before immersing it in the solutions.
5. Setup the calorimeter.
6. Pour the sodium hydroxide solution carefully to the hydrochloric acid solution and
cover the calorimeter. Stir the reaction mixture continuously until a maximum
temperature of the solution is reached. Record the temperature.
- Complete the table below. (1 pt each)
|
a) Initial temperature of hydrochloric acid |
31.0 oC |
|
b) Initial temperature of sodium hydroxide |
30.0 oC |
|
c) Average initial temperature of acid and base (oC) |
|
|
d) Final temperature of neutralized mixture |
44.0 oC |
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e) Change in temperature, ΔT (oC) |
|
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f) qH2O for the reaction (J) (Assume 50.0 mL of solution and use average density of 1.02 g/mL) |
|
|
g) ΔHneut (J) |
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