Q12 of 270 Page 66

How is the concentration of hydronium ions (H3O+) affected when the solution of an acid is diluted?

Dilution of an acid results in the decrease of concentration of hydronium ions(H3O+).


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10 Name one natural source of each of the following acids:

(a) Citric acid (b) Oxalic acid


(c) Lactic acid (d) Tartaric acid

 11 Name one animal and one plant whose stings contain formic acid (or methanoic acid). 13 Write word equations and then balanced equations for the reactions taking place when:

(a) dilutesulphuric acid reacts with zinc granules.


(b) dilute hydrochloric acid reacts with magnesium ribbon.


(c) dilutesulphuric acid reacts with aluminium powder.


(d) dilute hydrochloric acid reacts with iron fillings.

 14 Complete and balance the following chemical equations: