7.2 Classifying Chemical Reactions
12. Use the following equations to answer the next four questions:
i. H2 O(s) ⟶ H2 O(l)
ii. Na+(aq) + Cl−(aq) + Ag+(aq) + NO3
−(aq) ⟶ AgCl(s) + Na+(aq) + NO3
iii. CH3 OH(g) + O2(g) ⟶ CO2(g) + H2 O(g)
iv. 2H2 O(l) ⟶ 2H2(g) + O2(g)
v. H+(aq) + OH−(aq) ⟶ H2 O(l)
(a) Which equation describes a physical change?
(b) Which equation identifies the reactants and products of a combustion reaction?
(c) Which equation is not balanced?
(d) Which is a net ionic equation?
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