MEASURING CONCENTRATION

MOLARITY

Measure of the concentration that tells the number of moles of solute in one liter of solution

Symbol – M

Molarity = moles solute / liters solution

WHAT IS THE MOLARITY OF 3.5L OF A SOLUTION THAT CONTAINS 90.0G OF NACL?

A) 26 MB) 1.5 MC) 0.44 MD) 2.3 M

WHAT IS THE MOLARITY OF A SOLUTION COMPOSED OF 5.85G OF KI IN .125L OF SOLUTION?

A) 0.28 MB) 47 MC) 3.6 MD) 0.0044 M

HOW MANY MOLES OF HCL ARE PRESENT IN 0.8L OF A 0.50 M SOLUTION?

A) 0.63 molesB) 0.40 molesC) 1.6 molesD) 14.6 moles

HOW MANY GRAMS OF H2SO4 ARE PRESENT IN 0.500L OF A 0.150 M SOLUTION?

A) 0.075 gB) 3.33 gC) 29 gD) 7.4 g

MOLALITY

Moles of solute per kilogram of solvent Symbol – m

Molality = moles solute/ kg solvent

WHAT IS THE MOLALITY OF A SOLUTION THAT CONTAINS 17.1G OF C12H22O11 DISSOLVED IN 125G OF WATER?

A) 137 mB) 0.0004 mC) 0.40 mD) 6.25 m