Rate of Reaction [RPA 3]

Question 1

How can rate of reaction be calculated

Answer 1

Question 2

Disappearing cross Notes

Answer 2

• Na2S2O3 (aq) + 2HCl (aq) → 2NaCl (aq) + H2O (l) + SO2 (g) + S (s)
• (sodium Thiosulphate)
• Factors include changing temperature and most commonly changing concentration of HCL
• Sulphur is displaced which is an opaque precipitate
• Plot concentration against time, or 1/t against time