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7.1 Group 1

7.1 Group 1

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Question 11
F

0.46 g of sodium reacts completely with water. The solution is then made up to 200 cm3\mathrm{cm^{3}}cm3 with water.

2Na+2H2O→2NaOH+H2\mathrm{2Na + 2H_{2}O \rightarrow 2NaOH + H_{2}}2Na+2H2​O→2NaOH+H2​

Relative atomic masses: H = 1, O = 16, Na = 23

What is the concentration of sodium hydroxide in the solution?

[1]
A

8.00 g dm−38.00\,\mathrm{g\,dm^{-3}}8.00gdm−3

B

4.00 g dm−34.00\,\mathrm{g\,dm^{-3}}4.00gdm−3

C

2.30 g dm−32.30\,\mathrm{g\,dm^{-3}}2.30gdm−3

D

4.00×10−3 g dm−34.00\times10^{-3}\,\mathrm{g\,dm^{-3}}4.00×10−3gdm−3

Markscheme

7.1 Group 1 Questions

  1. GCSE
  2. /Chemistry
  3. /7.1 Group 1

75 exam-style questions on Edexcel GCSE Chemistry 7.1 Group 1, covering 7.1.1 Classifying elements by group in the periodic table and 7.1.2 Properties and reactions of the alkali metals. Each one has a worked solution and a mark scheme showing where the marks go.

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