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Unformatted text preview: ich must be solids (s), liquids (l) or gases (g). For (e): see Fig 4.16. 3. Which of the following is a Brǿnsted acid? (b) CH3COO‐ (c) SO42‐ (d) ClO4‐ (e) NO3‐ (a) HSO4‐ th th th Hint: 11 ed.: p.p. 127‐128; 10 ed. p. 130; 9 ed. p. 128. Example 4.3. You need to memorize the definition. Definition: Brǿnsted acids must contain available (releasable) hydrogen ions while the Brǿnsted bases must be able to accept hydrogen ions. To obtain Bronsted acid, simply add H+; to obtain Bronsted base, simply subtract H+. 4. Which of the following underlined atoms contains the oxidation number as ‐1? (b) CaC2 (c) SO42‐ (d) PtCl42‐ (e) NaO2 (a) Cs2O th Hint: 11 ed.: p.p. 135‐136 and see Examples 4.5 and 4.6; 10th ed. p.p. 136‐139; 9th ed. p.p. 134‐137. You need to Memorize the rules. See Example 4.5. 5. Which of the following redox reactions will occur according to activity series? (a) Cu(s) + 2HCl(aq) CuCl2(aq) + H2(g) (b) 2Ag(s) + 2H2O(l) AgOH(s) + H2(g) (c) Mg(s) + CuSO4(aq) MgSO4(aq) + Cu(s) (d) Pt(s) + FeSO4(aq) PtSO4(aq) + Fe(s) (e) 2Al(s) + 3Ca(NO3)2(aq) 2Al((NO3)3(aq) + 3Ca(s) Hint: 11th ed.: Activity table: 11th ed.: p. 141, fig. 4.16; 10th ed. Fig 4.16, p. 143; 9th ed. Fig. 4.16, p. 13...
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