Problem 62
What is the molar concentration of a saturated solution of calcium hydroxide that contains \(0.185 \mathrm{~g}\) of solute in \(100.0 \mathrm{~mL}\) of solution?
Problem 63
A hospital glucose solution is analyzed to verify its concentration. A \(10.0 \mathrm{~mL}\) sample with a mass of \(10.483 \mathrm{~g}\) is evaporated to dryness. If the solid glucose residue has a mass of \(0.524 \mathrm{~g},\) what are \((\mathrm{a})\) the mass \(/ \mathrm{mass}\) percent concentration, and (b) the molar concentration of the glucose, \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\) solution?
Problem 64
A hospital saline solution is analyzed to confirm its concentration. A \(50.0 \mathrm{~mL}\) sample with a mass of \(50.320 \mathrm{~g}\) is evaporated to dryness. If the solid sodium chloride residue has a mass of \(0.453 \mathrm{~g}\), find (a) the mass / mass percent concentration, and (b) the molar concentration of the \(\mathrm{NaCl}\) solution.
Problem 65
Concentrated hydrochloric acid is \(12 \mathrm{M}\). What is the molarity of an \(\mathrm{HCl}\) solution prepared by diluting \(10.0 \mathrm{~mL}\) of concentrated acid to a total volume of \(250.0 \mathrm{~mL}\) ?
Problem 66
Concentrated acetic acid is \(17 M .\) What is the molarity of an \(\mathrm{CH}_{3} \mathrm{COOH}\) solution prepared by diluting \(50.0 \mathrm{~mL}\) of \(\mathrm{con}-\) centrated acid to a total volume of \(500.0 \mathrm{~mL} ?\)
Problem 67
Concentrated sulfuric acid is \(18 M\). What volume of \(\mathrm{H}_{2} \mathrm{SO}_{4}\) is diluted with distilled water to prepare \(2.50 \mathrm{~L}\) of \(0.10 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4} ?\)
Problem 68
Concentrated nitric acid is \(16 \mathrm{M}\). What volume of \(\mathrm{HNO}_{3}\) is diluted with distilled water to prepare \(5.00 \mathrm{~L}\) of \(0.10 \mathrm{M} \mathrm{HNO}_{3} ?\)
Problem 69
Given that \(50.0 \mathrm{~mL}\) of \(0.100 \mathrm{M}\) magnesium bromide reacts with \(13.9 \mathrm{~mL}\) of silver nitrate solution according to the unbalanced equation $$ \operatorname{MgBr}_{2}(a q)+\operatorname{AgNO}_{3}(a q) \rightarrow \operatorname{AgBr}(s)+\operatorname{Mg}\left(\mathrm{NO}_{3}\right)_{2}(a q) $$ (a) What is the molarity of the \(\mathrm{AgNO}_{3}\) solution? (b) What is the mass of AgBr precipitate?
Problem 71
In a concert auditorium, stage lights demonstrate the Tyndall effect. What can you conclude about the air in the auditorium?
Problem 72
In foggy weather, automobile headlights demonstrate the Tyndall effect. What is the approximate size of water droplets in the fog?
