Reactions of acids

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Question 2
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Propanoic acid is a weak carboxylic acid often used as a preservative in animal feed.

The chemical formula of propanoic acid is C3H6O2\text{C}_3\text{H}_6\text{O}_2C3​H6​O2​.

a.

Which ion is produced by propanoic acid molecules when they partially ionise in an aqueous solution?

  • OH−\text{OH}^-OH−
  • O2−\text{O}^{2-}O2−
  • H+\text{H}^+H+
[1]
b.

Calculate the relative formula mass (MrM_rMr​) of propanoic acid (C3H6O2\text{C}_3\text{H}_6\text{O}_2C3​H6​O2​).

Relative atomic masses (ArA_rAr​): H=1\text{H} = 1H=1, C=12\text{C} = 12C=12, O=16\text{O} = 16O=16.

[2]

Reactions of acids Questions

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