Edexcel A-Level Chemistry A2 17.32 The Role of Mn2 Ions in Autocatalysing the Reaction Between Mno4 and C2o4 2 Ions Questions

Practise Edexcel IAL Chemistry 17.32 by explaining the slow start, acceleration and final slowdown of the manganate-ethanedioate reaction as Mn2+ catalyst forms and reactants are consumed.

Exam points

Interpret rate graphs showing slow start, acceleration and final slowing.
Identify Mn2+ as the autocatalyst produced during the manganate(VII) reaction.

[Maximum number: 1]

Acidified manganate(VII) ions react with ethanedioate ions.

2 \mathrm{MnO}_{4}^{-}+16 \mathrm{H}^{+}+5 \mathrm{C}_{2} \mathrm{O}_{4}^{2-} \rightarrow 2 \mathrm{Mn}^{2+}+8 \mathrm{H}_{2} \mathrm{O}+10 \mathrm{CO}_{2}

The rate of this reaction increases then decreases.
What are the reasons for these changes in rate of reaction?
A
B
C
D

Table for Question Edexcel A-Level Chemistry A2 17.32 The Role of Mn2 Ions in Autocatalysing the Reaction Between Mno4 and C2o4 2 Ions Questions question 1 — Edexcel A-Level Chemistry A2

kinetic energies of particles increase then reactant concentration decreases

Mn2+ acts as a catalyst; concentration of reactants decreases

MnO4− acts as a catalyst; kinetic energies decrease

MnO4− acts as a catalyst; concentration of reactants decreases

All question bank results loaded

Edexcel A-Level Chemistry A2 17.32 The Role of Mn2 Ions in Autocatalysing the Reaction Between Mno4 and C2o4 2 Ions Questions question 1