Problem 84
Potassium chloride has a solubility of \(43 \mathrm{~g}\) of \(\mathrm{KCl}\) in \(100 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\) at \(50{ }^{\circ} \mathrm{C}\). State if each of the following forms an unsaturated or saturated solution at \(50^{\circ} \mathrm{C}\) : a. adding \(25 \mathrm{~g}\) of \(\mathrm{KCl}\) to \(100 . \mathrm{g}\) of \(\mathrm{H}_{2} \mathrm{O}\) b. adding \(25 \mathrm{~g}\) of \(\mathrm{KCl}\) to \(50 . \mathrm{g}\) of \(\mathrm{H}_{2} \mathrm{O}\) c. adding \(86 \mathrm{~g}\) of \(\mathrm{KCl}\) to \(150 . \mathrm{g}\) of \(\mathrm{H}_{2} \mathrm{O}\)
Problem 86
Indicate whether each of the following ionic compounds is soluble in water: a. \(\mathrm{CuCO}_{3}\) b. \(\mathrm{FeO}\) c. \(\mathrm{Mg}_{3}\left(\mathrm{PO}_{4}\right)_{2}\) d. \(\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4}\) e. \(\mathrm{NaHCO}_{3}\)
Problem 87
Calculate the mass percent \((\mathrm{m} / \mathrm{m})\) of a solution containing \(15.5 \mathrm{~g}\) of \(\mathrm{Na}_{2} \mathrm{SO}_{4}\) and \(75.5 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\)
Problem 88
How many grams of \(\mathrm{K}_{2} \mathrm{CO}_{3}\) are in \(750 \mathrm{~mL}\) of a \(3.5 \%(\mathrm{~m} / \mathrm{v})\) \(\mathrm{K}_{2} \mathrm{CO}_{3}\) solution?
Problem 89
A patient receives all her nutrition from fluids given through the vena cava. Every 12 hours, \(500 \mathrm{~mL}\) of a solution that is \(5.0 \%(\mathrm{~m} / \mathrm{v})\) amino acids (protein) and \(20 \%(\mathrm{~m} / \mathrm{v})\) glucose (carbohydrate) is given along with \(500 \mathrm{~mL}\) of a \(10 \%(\mathrm{~m} / \mathrm{v})\) lipid (fat). a. In 1 day, how many grams each of amino acids, glucose, and lipid are given to the patient? b. How many kilocalories does she obtain in 1 day?
Problem 90
An 80-proof brandy is a \(40 . \%\) (v/v) ethanol solution. The "proof" is twice the percent concentration of alcohol in the beverage. How many milliliters of alcohol are present in \(750 \mathrm{~mL}\) of brandy?
Problem 91
How many milliliters of a \(12 \%(\mathrm{v} / \mathrm{v})\) propyl alcohol solution would you need to obtain \(4.5 \mathrm{~mL}\) of propyl alcohol?
Problem 94
What is the molarity of a solution containing \(15.6 \mathrm{~g}\) of \(\mathrm{KCl}\) in \(274 \mathrm{~mL}\) of \(\mathrm{KCl}\) solution?
Problem 95
A solution is prepared with \(70.0 \mathrm{~g}\) of \(\mathrm{HNO}_{3}\) and \(130.0 \mathrm{~g}\) of \(\mathrm{H}_{2} \mathrm{O}\). It has a density of \(1.21 \mathrm{~g} / \mathrm{mL}\). a. What is the mass percent \((\mathrm{m} / \mathrm{m})\) of the \(\mathrm{HNO}_{3}\) solution? b. What is the total volume of the solution? c. What is the mass/volume percent \((\mathrm{m} / \mathrm{v}) ?\) d. What is its molarity (M)?
Problem 97
How many grams of solute are in each of the following solutions? a. \(2.5 \mathrm{~L}\) of a \(3.0 \mathrm{M} \mathrm{Al}\left(\mathrm{NO}_{3}\right)_{3}\) solution b. \(75 \mathrm{~mL}\) of a \(0.50 \mathrm{M} \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) solution c. \(235 \mathrm{~mL}\) of a \(1.80 \mathrm{M} \mathrm{LiCl}\) solution
