Q22 of 152 Page 19

Convey the following information in the form of a balanced chemical equation:

"An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution."

FeS04(aq.) + 2NaOH(aq.) Fe(OH)2 (s) + Na 2S02 (aq.)

The equation is balanced.



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22 Explain, with example, how the physical states of the reactants and products can be shown in a chemical equation. 22 Balance the following equation and add state symbols:

Zn + HCl ZnCl2 + H2

 23 Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer. 24 Aluminium hydroxide reacts with sulphuric acid to form aluminium sulphate and water. Write a balanced equation for this reaction.