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4.1 Predicting chemical reactions

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Question 11

A chemist analyses two compounds containing the same unknown metal, X.

CompoundMetal ion presentAppearance
PX+\mathrm{X^{+}}X+red solid
QX2+\mathrm{X^{2+}}X2+blue solid
a.

Explain why the results suggest that X is a transition metal.

[2]
b.

Element Y is in Group 6. A third compound contains X+\mathrm{X^{+}}X+ ions and ions of Y.

Give the formula of this compound. Explain how the ion charges determine the formula.

[2]
Markscheme

4.1 Predicting chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /4.1 Predicting chemical reactions

113 exam-style questions on OCR GCSE Chemistry 4.1 Predicting chemical reactions, covering 4.1.1 Properties and trends in Groups 1, 7 and 0, 4.1.2 Properties of the transition metals, 4.1.3 Reactivity predicted from position in the Periodic Table, and 4.1.4 Reactivity of metals and the reactivity series. Each one has a worked solution and a mark scheme showing where the marks go.

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