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384 Chapter 7 | Stoichiometry of Chemical Reactions
7.2 Classifying Chemical Reactions
12. Use the following equations to answer the next four questions: i.
ii. iii.
iv.
v.
(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?
13. Indicate what type, or types, of reaction each of the following represents:
(a)
(b)
(c)
14. Indicate what type, or types, of reaction each of the following represents:
(a)
(b)
(c)
(d)
15. Silver can be separated from gold because silver dissolves in nitric acid while gold does not. Is the dissolution of silver in nitric acid an acid-base reaction or an oxidation-reduction reaction? Explain your answer.
16. Determine the oxidation states of the elements in the following compounds: (a) NaI
(b) GdCl3
(c) LiNO3
(d) H2Se
(e) Mg2Si
(f) RbO2, rubidium superoxide (g) HF
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