1)Given: 5 grams of calcium oxide mixed with 450 milliliters of warm water (density of water = 0.975 g/cm3)

Unknown: a. Molecular weight of solute

b. Moles of solute

c. Weight of solvent in kilograms

d. Molality

e. Percentage strength (% w/w)

2) A 5 ml volume of eyedrops containing the mydriatic drug cyclopentolate HCl is diluted to 100 ml and then 20 ml of the dilution

is diluted to 100 ml. The diluted sample was measured by UV spectrophotometry and was found to contain 20.20 mg/100 ml

of the drug. Calculate the % w/v of the drug in the eyedrops.

pur-new-sol

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