To study the effect of temperature on the rate of reaction between sodium thiosulphate and hydrochloric acid
Answers
Answer:
The rate of chemical reaction is directly proportional to the temperature. As the temperature increases, the reaction rate also increases. With the increase in temperature the kinetic energy of the molecules also increases. Usually, it is observed that for every 10-degree increase in temperature the rate of reaction is doubled. Therefore, the rate of reaction of hydrochloric acid and sodium thiosulphate also increases with rise in temperature.
Explanation:
The effect of temperature on the rate of reaction:
1. Take a conical flask of volume 100 mL.
2. Add 50 mL of 0.1M sodium thiosulphate solution to it.
3. With the help of a thermometer measure, the temperature of solution added to the flask.
4. Take 1M HCl of volume 10 mL with the help of a burette and add it to the conical flask containing sodium thiosulphate.
5.Start the stopwatch as soon as you have poured half of hydrochloric acid in the flask containing sodium thiosulphate solution.
6.Take a white tile and draw a cross mark on it.
7.Shake the conical flask and place it on the tile.
8.Observe the flask and start the stop-watch as soon as the cross mark becomes invisible.
9.Empty the flask and wash it with concentrated nitric acid first and later with distilled water.
10.Take the washed flask add 50 mL of 0.1M sodium thiosulphate solution and heat it to (T+ 10)°.
11.Continue the steps from point 4.
12.Repeat the experiment for (T+ 20)°, (T+ 30)°, (T+ 40)° and record the results.
13.Record the time taken for the process.