Problem 27
Explain the following observations: a. More sugar dissolves in hot tea than in iced tea. b. Champagne in a warm room goes flat. c. A warm can of soda has more spray when opened than a cold one.
Problem 28
Explain the following observations: a. An open can of soda loses its "fizz" faster at room temperature than in the refrigerator. b. Chlorine gas in tap water escapes as the sample warms to room temperature. c. Less sugar dissolves in iced coffee than in hot coffee.
Problem 29
Predict whether each of the following ionic compounds is soluble in water: a. \(\mathrm{LiCl}\) b. \(\mathrm{AgCl}\) c. \(\mathrm{BaCO}_{3}\) d. \(\mathrm{K}_{2} \mathrm{O}\) e. \(\mathrm{Fe}\left(\mathrm{NO}_{3}\right)_{3}\)
Problem 31
What is the difference between a \(5 \%(\mathrm{~m} / \mathrm{m})\) glucose solution and a \(5 \%(\mathrm{~m} / \mathrm{v})\) glucose solution?
Problem 32
What is the difference between a \(10 \%(\mathrm{v} / \mathrm{v})\) methyl alcohol \(\left(\mathrm{CH}_{3} \mathrm{OH}\right)\) solution and a \(10 \%(\mathrm{~m} / \mathrm{m})\) methyl alcohol solution?
Problem 33
Calculate the mass percent \((\mathrm{m} / \mathrm{m})\) for the solute in each of the following solutions: a. \(25 \mathrm{~g}\) of \(\mathrm{KCl}\) and \(125 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\) b. \(12 \mathrm{~g}\) of sugar in \(225 \mathrm{~g}\) of tea solution with sugar c. \(8.0 \mathrm{~g}\) of \(\mathrm{CaCl}_{2}\) in \(80.0 \mathrm{~g}\) of \(\mathrm{CaCl}_{2}\) solution
Problem 34
Calculate the mass percent \((\mathrm{m} / \mathrm{m})\) for the solute in each of the following solutions: a. \(75 \mathrm{~g}\) of \(\mathrm{NaOH}\) in \(325 \mathrm{~g}\) of \(\mathrm{NaOH}\) solution b. \(2.0 \mathrm{~g}\) of \(\mathrm{KOH}\) and \(20.0 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\) c. \(48.5 \mathrm{~g}\) of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) in \(250.0 \mathrm{~g}\) of \(\mathrm{Na}_{2} \mathrm{CO}_{3}\) solution
Problem 35
Calculate the mass/volume percent \((\mathrm{m} / \mathrm{v})\) for the solute in each of the following solutions: a. \(75 \mathrm{~g}\) of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) in \(250 \mathrm{~mL}\) of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) solution b. \(39 \mathrm{~g}\) of sucrose in \(355 \mathrm{~mL}\) of a carbonated drink
Problem 36
Calculate the mass/volume percent \((\mathrm{m} / \mathrm{v})\) for the solute in each of the following solutions: a. \(2.50 \mathrm{~g}\) of \(\mathrm{LiCl}\) in \(40.0 \mathrm{~mL}\) of \(\mathrm{LiCl}\) solution b. \(7.5 \mathrm{~g}\) of casein in \(120 \mathrm{~mL}\) of low-fat milk
Problem 37
Calculate the grams or milliliters of solute needed to prepare the following solutions: a. \(50.0 \mathrm{~mL}\) of a \(5.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{KCl}\) solution b. \(1250 \mathrm{~mL}\) of a \(4.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{NH}_{4} \mathrm{Cl}\) solution c. \(250 . \mathrm{mL}\) of a \(10.0 \%(\mathrm{v} / \mathrm{v})\) acetic acid solution
