RP3 - Investigation of how the rate of a reaction changed with temperature

Question 1

what’s the equation used for this reaction between sodium thiosulfate and hydrochloric acid

Answer 1

Na2S2O3 + 2HCl => 2NaCl + SO2 + S + H2O

Question 2

what’s the typical method used

Answer 2

• measure 10cm3 of 0.2moldm3 hcl and 10cm3 of sodium thipsulfate in separate clean measuring cylinder . Pour solutions in separate boiling tubes
• Choose a temp to investigate use water bath to get the two solutions to that temp by placing the boiling tubes in the water bath
• place flask on centre of large cross
• add sodium thiosulfate to flask
• add hcl and start stopwatch and swirl to mix
• stop clock when cross disappears and note the time
• repeat experiment for four more different temp