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Atoms and reactions

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Question 22

What is the oxidation number of S\text{S}S in barium thiosulfate monohydrate, BaS2O3⋅H2O\text{BaS}_2\text{O}_3 \cdot \text{H}_2\text{O}BaS2​O3​⋅H2​O?

A

+2+2+2

B

+3+3+3

C

+4+4+4

D

+6+6+6

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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