91Ó°ÊÓ

Why would solutions with high salt content be used as food preservatives?

What volume, in \(\mathrm{mL}\), of \(2.50 \mathrm{M}\) of sodium chloride solution is needed to obtain \(3.0 \mathrm{~g}\) of \(\mathrm{NaCl}\) by evaporation? (9.4)

What is the concentration of an \(\mathrm{AgNO}_{3}\) solution when \(1.50 \mathrm{~g}\) of silver nitrate is dissolved in \(25.0 \mathrm{~mL}\) of water? (9.4)

How many grams of solute are in each of the following solutions? (9.4) 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

Calculate the final concentration of the solution when water is added to prepare each of the following: (9.5) a. \(25.0 \mathrm{~mL}\) of a \(0.200 \mathrm{M}\) NaBr solution is diluted to \(50.0 \mathrm{~mL}\) b. \(15.0 \mathrm{~mL}\) of a \(12.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{K}_{2} \mathrm{SO}_{4}\) solution is diluted to \(40.0 \mathrm{~mL}\) c. \(75.0 \mathrm{~mL}\) of a \(6.00 \mathrm{M} \mathrm{NaOH}\) solution is diluted to \(255 \mathrm{~mL}\)

Calculate the final concentration of the solution when water is added to prepare each of the following: (9.5) a. \(25.0 \mathrm{~mL}\) of a \(18.0 \mathrm{M} \mathrm{HCl}\) solution is diluted to \(500 . \mathrm{mL}\) b. \(50.0 \mathrm{~mL}\) of a \(15.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{NH}_{4} \mathrm{Cl}\) solution is diluted to \(125 \mathrm{~mL}\) c. \(4.50 \mathrm{~mL}\) of a \(8.50 \mathrm{M}\) KOH solution is diluted to \(75.0 \mathrm{~mL}\)

What is the initial volume, in milliliters, needed to prepare each of the following diluted solutions? (9.5) a. \(250 \mathrm{~mL}\) of \(3.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{HCl}\) from \(10.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{HCl}\) b. \(500 . \mathrm{mL}\) of \(0.90 \%(\mathrm{~m} / \mathrm{v}) \mathrm{NaCl}\) from \(5.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{NaCl}\) c. \(350 . \mathrm{mL}\) of \(2.00 \mathrm{M} \mathrm{NaOH}\) from \(6.00 \mathrm{M} \mathrm{NaOH}\)

What is the initial volume, in milliliters, needed to prepare each of the following diluted solutions? (9.5) a. \(250 \mathrm{~mL}\) of \(5.0 \%(\mathrm{~m} / \mathrm{v})\) glucose from \(20 . \%(\mathrm{~m} / \mathrm{v})\) glucose b. \(45.0 \mathrm{~mL}\) of \(1.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{CaCl}_{2}\) from \(5.0 \%(\mathrm{~m} / \mathrm{v}) \mathrm{CaCl}_{2}\) c. \(100 . \mathrm{mL}\) of \(6.00 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\) from \(18.0 \mathrm{M} \mathrm{H}_{2} \mathrm{SO}_{4}\)

What is the final volume, in milliliters, when \(25.0 \mathrm{~mL}\) of each of the following solutions is diluted to provide the given concentration? (9.5) a. \(10.0 \%\) (m/v) HCl solution to give a \(2.50 \%\) (m/v) HCl solution b. \(5.00 \mathrm{M} \mathrm{HCl}\) solution to give a \(1.00 \mathrm{M} \mathrm{HCl}\) solution c. \(6.00 \mathrm{M} \mathrm{HCl}\) solution to give a \(0.500 \mathrm{M} \mathrm{HCl}\) solution

What is the final volume, in milliliters, when \(5.00 \mathrm{~mL}\) of each of the following solutions is diluted to provide the given concentration? (9.5) a. \(20.0 \%\) (m/v) NaOH solution to give a \(4.00 \%\) (m/v) \(\mathrm{NaOH}\) solution b. \(0.600 \mathrm{M} \mathrm{NaOH}\) solution to give a \(0.100 \mathrm{M} \mathrm{NaOH}\) solution c. \(16.0 \%\) (m/v) NaOH solution to give a \(2.00 \%\) (m/v) \(\mathrm{NaOH}\) solution