Compute the weight (g) of solute needed to make the solutions listed below: a. 1250 mL of 0.85 M AlCl3 b. 0.500 L of 9.25 N K2SO4 c. 350 g of 13.2 %w/w of Ca(OH)2
1. Compute the weight (g) of solute needed to make the solutions listed below:
a. 1250 mL of 0.85 M AlCl3
b. 0.500 L of 9.25 N K2SO4
c. 350 g of 13.2 %w/w of Ca(OH)2
2. Calculate the %w/v of a solution made by dissolving 22.0 g CH3OH (methanol) in
C2H5OH (ethanol) to make 100 mL solution.
3. What is the %v/v of 10.0 mL of CH3OH (methanol) dissolved in water to a volume of
40.0 mL?
4. A solution is prepared at 25oC by mixing 20 g of K2SO4 with 150 cc of water. The density
of water at this temperature is 1 g/cc. What is the m of K2SO4?
5. Express the formality (F) the concentration of each of the following solutions:
a. 28.4% NH3 by weight, having a density of 0.808 g/mL
b. 69.5% HNO3 by weight, having a density of 1.42 g/mL
6. An aqueous solution of hydrofluoric acid is 12.5 molal with respect to HF and has a
density of 1.070 g/mL at 25oC. Calculate
a. mole fraction of HF
b. %w/w of HF
c. molarity
d. molality
7. Calculate the volume of concentrated reagent required to prepare the diluted
solutions indicated:
a. 15 M NH3 to prepare 50 mL of 6.0 M NH3
b. 18 M H2SO4 to prepare 250 mL of 10.0 M H2SO4
8. Calculate the molarity of the solutions by mixing 250 mL of 0.75 M H2SO4 with
a. 150 mL of H2O
b. 250 mL of 0.70 M H2SO4
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