Compute the weight (g) of solute needed to make the solutions listed below: a. 1250mL of 0.85M AlCl3 b. 0.500L of 9.25N K2SO4 c. 350g of 13.2%w/w of Ca(OH)2 2. Calculate the %w/v of a solution made by dissolving 22.0g CH3OH (methanol) in C2H5OH (ethanol) to make 100mL solution. 3. What is the %v/v of 10mL CH3OH (methanol) dissolved in water to a volume of 40mL. 4. A solution is prepared at 25oC by mixing 20g of K2SO4 with 150mL of water. The density of water at this temperature is 1 g/mL. What is the m of K2SO4. 5. 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 a. mole fraction of HF
Compute the weight (g) of solute needed to make the solutions listed below:
a. 1250mL of 0.85M AlCl3
b. 0.500L of 9.25N K2SO4
c. 350g of 13.2%w/w of Ca(OH)2
2. Calculate the %w/v of a solution made by dissolving 22.0g CH3OH (methanol) in
C2H5OH (ethanol) to make 100mL solution.
3. What is the %v/v of 10mL CH3OH (methanol) dissolved in water to a volume of 40mL.
4. A solution is prepared at 25oC by mixing 20g of K2SO4 with 150mL of water. The
density of water at this temperature is 1 g/mL. What is the m of K2SO4.
5. 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
a. mole fraction of HF
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