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Atoms and reactions

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Question 30

The unbalanced equation for the redox reaction between acidified manganate(VII) ions and sulfur dioxide is shown below.

…MnO4−(aq)+…SO2(g)+…H2O(l)→…Mn2+(aq)+…SO42−(aq)+…H+(aq) \dots \text{MnO}_4^-(\text{aq}) + \dots \text{SO}_2(\text{g}) + \dots \text{H}_2\text{O}(\text{l}) \rightarrow \dots \text{Mn}^{2+}(\text{aq}) + \dots \text{SO}_4^{2-}(\text{aq}) + \dots \text{H}^+(\text{aq}) …MnO4−​(aq)+…SO2​(g)+…H2​O(l)→…Mn2+(aq)+…SO42−​(aq)+…H+(aq)

Which coefficients for SO2(g)\text{SO}_2(\text{g})SO2​(g) and H+(aq)\text{H}^+(\text{aq})H+(aq) will balance this equation?

A

333 and 444

B

555 and 888

C

555 and 444

D

222 and 222

Markscheme

Atoms and reactions Questions

  1. A Level
  2. /Chemistry
  3. /Atoms and reactions

199 exam-style questions on OCR A A Level Chemistry Atoms and reactions, covering Atomic structure and isotopes, Compounds, formulae and equations, Amount of substance, Acids, and Redox. Each one has a worked solution and a mark scheme showing where the marks go.

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