Problem 25
What three factors increase the rate of dissolving of a solid substance in solution?
Problem 26
Indicate whether each of the following increases, decreases, or has no effect on the rate at which \(10.0 \mathrm{~g}\) of sugar dissolves in a liter of water. (a) using water from the refrigerator (b) shaking the sugar and water (c) using powdered sugar rather than crystals (d) using tap water rather than distilled water
Problem 39
The solubility of rock salt is \(40 \mathrm{~g} / 100 \mathrm{~g}\) water at \(30{ }^{\circ} \mathrm{C} .\) If \(\mathrm{a}\) solution contains \(10 \mathrm{~g}\) of rock salt in \(25 \mathrm{~g}\) of water at \(30{ }^{\circ} \mathrm{C}\) is the solution saturated, unsaturated, or supersaturated?
Problem 40
The solubility of sugar is \(110 \mathrm{~g} / 100 \mathrm{~g}\) water at \(30^{\circ} \mathrm{C} .\) If a solution contains \(95 \mathrm{~g}\) of sugar in \(25 \mathrm{~g}\) of water at \(30{ }^{\circ} \mathrm{C},\) is the solution saturated, unsaturated, or supersaturated?
Problem 43
Calculate the mass/mass percent concentration for each of the following solutions. (a) 1.25 g \(\mathrm{NaCl}\) in \(100.0 \mathrm{~g}\) of solution (b) \(2.50 \mathrm{~g} \mathrm{~K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) in \(95.0 \mathrm{~g}\) of solution (c) \(10.0 \mathrm{~g} \mathrm{CaCl}_{2}\) in \(250.0 \mathrm{~g}\) of solution (d) \(65.0 \mathrm{~g} \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) in \(125.0 \mathrm{~g}\) of solution
Problem 44
Calculate the mass/mass percent concentration for each of the following solutions. (a) \(20.0 \mathrm{~g} \mathrm{KI}\) in \(100.0 \mathrm{~g}\) of water (b) \(2.50 \mathrm{~g} \mathrm{AgC}_{2} \mathrm{H}_{3} \mathrm{O}_{2}\) in \(95.0 \mathrm{~g}\) of water (c) \(5.57 \mathrm{~g} \mathrm{SrCl}_{2}\) in \(225.0 \mathrm{~g}\) of water (d) \(50.0 \mathrm{~g} \mathrm{C}_{12} \mathrm{H}_{22} \mathrm{O}_{11}\) in \(200.0 \mathrm{~g}\) of water
Problem 46
Write three pairs of unit factors for each of the following aqueous solutions given the mass / mass percent concentration. (a) \(3.35 \% \mathrm{MgCl}_{2}\) (b) \(5.25 \% \mathrm{Cd}\left(\mathrm{NO}_{3}\right)_{2}\) (c) \(6.50 \% \mathrm{Na}_{2} \mathrm{CrO}_{4}\) (d) \(7.25 \% \mathrm{ZnSO}_{4}\)
Problem 47
What mass of solution contains the following amount of solute? (a) \(5.36 \mathrm{~g}\) of glucose in a \(10.0 \%\) solution (b) \(25.0 \mathrm{~g}\) of sucrose in a \(12.5 \%\) solution
Problem 48
What mass of solution contains the following amount of solute? (a) \(35.0 \mathrm{~g}\) of hydrochloric acid in a \(5.00 \%\) solution (b) \(10.5 \mathrm{~g}\) of acetic acid in a \(4.50 \%\) solution
Problem 49
What mass of solute is dissolved in the following solutions? (a) \(85.0 \mathrm{~g}\) of \(2.00 \% \mathrm{FeBr}_{2}\) solution (b) \(105.0 \mathrm{~g}\) of \(5.00 \% \mathrm{Na}_{2} \mathrm{CO}_{3}\) solution
