Chapter 4: Problem 9
Explain how a redox reaction involves electrons in the same way that an acid- base reaction involves protons. [Sections \(4.3\) and \(4.4]\)
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Chapter 4: Problem 9
Explain how a redox reaction involves electrons in the same way that an acid- base reaction involves protons. [Sections \(4.3\) and \(4.4]\)
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Separate samples of a solution of an unknown salt are treated with dilute solutions of \(\mathrm{HBr}, \mathrm{H}_{2} \mathrm{SO}_{4}\), and \(\mathrm{NaOH}\). A precipitate forms in all three cases. Which of the following cations could the solution contain: \(\mathrm{K}^{+} ; \mathrm{Pb}^{2+} ; \mathrm{Ba}^{2+}\) ?
If you want to double the concentration of a solution, how could you do it? [Section 4.5]
Salts of the sulfite ion, \(\mathrm{SO}_{3}^{2-}\), react with acids in a way similar to that of carbonates. (a) Predict the chemical formula, and name the weak acid that forms when the sulfite ion reacts with acids. (b) The acid formed in part (a) decomposes to form water and a gas. Predict the molecular formula, and name the gas formed. (c) Use a source book such as the CRC Handbook of Chemistry and Physics to confirm that the substance in part (b) is a gas under normal room-temperature conditions. (d) Write balanced net ionic equations of the reaction of \(\mathrm{HCl}(a q)\) with (i) \(\mathrm{Na}_{2} \mathrm{SO}_{3}(a q)\), (ii) \(\mathrm{Ag}_{2} \mathrm{SO}_{3}(s)\), (iii) \(\mathrm{KHSO}_{3}(s)\), and (iv) \(\mathrm{ZnSO}_{3}(a q)\)
Glycerol, \(\mathrm{C}_{3} \mathrm{H}_{8} \mathrm{O}_{3}\), is a substance used extensively in the manufacture of cosmetics, foodstuffs, antifreeze, and plastics. Glycerol is a water-soluble liquid with a density of \(1.2656 \mathrm{~g} / \mathrm{L}\) at \(15^{\circ} \mathrm{C}\). Calculate the molarity of a solution of glycerol made by dissolving \(50.000 \mathrm{~mL}\) glycerol at \(15^{\circ} \mathrm{C}\) in enough water to make \(250.00 \mathrm{~mL}\) of solution.
Name the spectator ions in any reactions that may be involved when each of the following pairs of solutions are mixed. (a) \(\mathrm{Na}_{2} \mathrm{CO}_{3}(a q)\) and \(\mathrm{Mg} \mathrm{SO}_{4}(a q)\) (b) \(\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}(a q)\) and \(\mathrm{Na}_{2} \mathrm{~S}(a q)\) (c) \(\left(\mathrm{NH}_{4}\right)_{3} \mathrm{PO}_{4}(a q)\) and \(\mathrm{CaCl}_{2}(a q)\)
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