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Question:

Write word equations and then balanced equations for the reaction taking place when:(a) Dilute sulphuric acid reacts with zinc granules.(b) Dilute hydrochloric acid reacts with magnesium ribbon.(c) Dilute sulphuric acid reacts with aluminium powder.(d) Dilute hydrochloric acid reacts with iron filings.

Solution:

a) Dilute sulphuric acid reacts with zinc granules to produce zinc sulphate and hydrogen gas
H2SO4(aq)+Zn(s)→ZnSO4(aq)+H2(g)
(b) Dilute hydrochloric acid reacts with magnesium ribbon to produce magnesium chloride and hydrogen gas.
2HCl(aq)+Mg(s)→MgCl2(aq)+H2(g)
(c) Dilute sulphuric acid reacts with aluminium powder to produce aluminium sulphate and hydrogen gas.
3H2SO4(aq)+2Al(s)→Al2(SO4)3(aq)+3H2(g)
(d) Dilute hydrochloric acid reacts with iron filings to produce ferric chloride and hydrogen gas.
6HCl(aq)+Fe(s)→2FeCl3(aq)+3H2(g)