Answer to Question #296695 in General Chemistry for yui

Question

Show your complete solution and write appropriate units for your final answers.

1. An ethanol solution is prepared by dissolving 10 mL of ethanol (C2H5OH) (density: 0.800 g/ml) in a sufficient volume of water to produce 100 mL of solution with a density of 0.982 g/mL. What is the concentration of ethanol in this solution expressed as:

a. Volume percent

b. Mass percent

c. Mass/volume percent

d. Mole fraction of Ethanol

e. Molarity

f. Molality

2. Hydrogen peroxide (H2O2) is a powerful oxidizing agent used in concentrated solution in rocket fuels and in diluted solutions is hair bleach. An Aqueous solution of 30% (m/m) has a density of 1.11 g/ml. Calculate the concentration in terms of:

a. Mole Fraction of H2O2

b. Molarity

Answer 1

a)0.982

b)0.11

C)0.78