Chemistry (feb mocks)

Question 1

What is the aim of the sodium thiosulphate and hydrochloric acid practical?

Answer 1

to investigate the effect of changing the temperature on the rate of reaction

Question 2

What is the method for the rate of reaction core practical?

Answer 2

1) Add 50cm^3 of dilute sodium thiosuphate solution to a conical flask
2) place flask on a piece of paper with a cross drawn on it
3) Add 10cm^3 of dilute hydrochloric acid to the conical flash and mix
4) when cross is no longer visible, strop clock and record time
5) repeat with different starting temps

Question 3

What were the results of the rate of reaction core practical?

Answer 3

As temperature increases, so does the rate of reaction, at higher temperatures by higher amounts