Semester Two Chemistry Review

Front

What is molality?

Back

Molality (m) is a measure of the concentration of a solute in a solution, defined as the number of moles of solute per kilogram of solvent.

Front

How do you calculate molality?

Back

Molality = moles of solute / kilograms of solvent.

Front

What is the formula to find moles from molarity and volume?

Back

Moles = Molarity (M) x Volume (L).

Front

What is the relationship between pH and pOH?

Back

pH + pOH = 14.

Front

What does a pH greater than 7 indicate?

Back

A pH greater than 7 indicates a basic (alkaline) solution.

Front

What does a pH less than 7 indicate?

Back

A pH less than 7 indicates an acidic solution.

Front

What happens to the molecules in a substance when thermal energy is added?

Back

The molecules move faster and space themselves farther apart.

Front

What is the pOH of a solution with [OH-] = 2.7 x 10^-4 mol/L?

Back

pOH = -log[OH-] = 3.56.

Front

What is the molarity of a solution?

Back

Molarity (M) is a measure of concentration defined as the number of moles of solute per liter of solution.

Front

How do you convert mL to L?

Back

To convert mL to L, divide the volume in mL by 1000.