UNITS OF CONCENTRATION

It is the unit for mass.

• gram

• liter

• centimeter

• molal

It is the minor component in a solution, dissolved in the solvent.

• water

• salt

• sugar

• solute

It is the number of units of a substance for every 1 billion units of a mixture.

• molarity

• molality

• parts per billion

• parts per million

It is the measure of moles of solute in 1 kilogram of solvent.

• parts per billion

• molality

• molarity

• percent by mass per volume

Density multiplied by volume equals mass.

• TRUE

• FALSE

A solution is said to be concentrated if it has a relatively large amount of dissolved solute.

• TRUE

• FALSE

Volumes of solute and solvent are always additive.

• TRUE

• FALSE

What is the molarity of a 6-liter solution containing 0.3 moles of NaCl?

• 0.1 M

• 0.04 M

• 0.06 M

• 0.05 M

Calculate the mass percent of a solution containing 50 grams of sugar dissolved in 50 grams of water.

• 50%

• 60%

• 70%

• 80%

A 1000-gram sample of ore is found to contain 0.70 gram of copper. What is the concentration of copper in the ore in parts per million?

• 70 ppm

• 700 ppm

• 7000 ppm

• 7 ppm