What volume of CO2 at s.t.p would be obtained by reacting trioxocarbonate (IV) with excess…

Chemistry JAMB 1991

What volume of CO2 at s.t.p would be obtained by reacting trioxocarbonate (IV) with excess acid?

(G.M.V at s.t.p = 22.4 dm3)

  • 2.240 cm 3
  • 22.40 cm 3 checkmark
  • 224.0 cm 3
  • 2240 cm 3

The correct answer is: B

Explanation

Na2CO3 + 2HCC → 2NaII + H2O
1000 cm3 IM Na2CO3 contains 22400 cm3
10cm3 IM Na2CO3 will contain (10) / (100) x 224
=224 cm3
10 cm3 0.1 Na2CO3 will contain (o.1 x 224) / (1) = 22.4 cm3
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