Percent by MassDescribes solutions in which a solid is

dissolved in liquidPercent by Mass = mass of solute/mass of

solution x 100Mass of solution is the sum of solute and solvent

In order to maintain a sodium chloride concentration similar to ocean water, an aquarium must contain 3.6 g NaCl per 100.0 g of water. What is the percent by mass of NaCl in solution?

3.6/103.6 x 100

3.5 %

You have 1500.0 g of a bleach solution. The percent by mass of the solute NaOCl is 3.62 %. How many grams of NaOCl are present?

Percent by VolumeBoth solute and solvent are liquidsPercent by Volume = volume of solute/volume of

solution x 100Volume of solution is the sum of solute and solvent

Rubbing alcohol is 70% isopropyl alcohol. If you have 100 mL of rubbing alcohol, how many mL is the alcohol?

Mole FractionRatio of # of moles of solution in solution to

total # of moles solute and solventXA = mole fraction for solvent

XA = nA / (nA + nB )

XB = mole fraction for solvent

XA = nB / (nA + nB )

A solution is 37.5% HCl and 62.5% water. Determine the mole fraction each compound.