Question

Q12. Determine the mass (in g) of each sucrose solution that contains 19 g of sucrose.

part A 4.5 % sucrose by mass

part B 2.7 % sucrose by mass

part C 13.3 % sucrose by mass

Q.13 The percent concentration of a solution is a ratio of the amounts of dissolved solute and solution, expressed as a percentage. The percent concentration of a solution can be written generally as

%concentration=amountofsoluteamountofsolution×100%

A mass percent concentration may be calculated for mass/mass using the equation

masspercent=massofsolutemassofsolution×100%

part A Calculate the mass percent of a solution that is prepared by adding 25.0 g of NaOH to 310 g of H2O.

part B Calculate the mass percent of a NaCl solution in which 137 g of NaCl is dissolved in 2.95 L of water at 25 ∘C (density = 0.997 g/mL).