Molarity Calculate the concentration of a solute in

Molarity Calculate the concentration of a solute in terms of grams per liter, molarity, and percent composition.

Molarity • Molarity is an unit of concentration in chemistry. • Concentration of a solution is a measure of the amount of solute that is dissolved in a given quantity of solvent. – A dilute solution is one that contains only a low concentration of solute.

Molarity • Molarity is the number of moles of a solute dissolved per liter of solution. moles of solute • Molarity = 1 liter solution

Units of Molarity 2. 0 moles HCl • 2. 0 M HCl = 1 L HCl solution 6. 0 moles HCl • 6. 0 M HCl = 1 L HCl solution

Calculating Molarity • If 4. 0 g Na. OH are used to make 500 m. L of Na. OH solution, what is the molarity (M) of the solution?

Calculating Molarity 1 mole Na. OH 4. 0 g Na. OH x = 0. 10 mol Na. OH 40. 0 g Na. OH 500 m. L x (1 L /1000 m. L) =. 500 L 0. 10 mol Na. OH 0. 500 L 0. 20 mol Na. OH / L 0. 20 M Na. OH

Sample Problem • A KOH solution with a volume of 400 m. L contains 2 moles of KOH. What is the molarity of the solution?

Sample Problem • A glucose solution with a volume of 2. 0 L contains 72 g glucose (C 6 H 12 O 6). If glucose has a molar mass of 180 g/mole, what is the molarity of the glucose solution?

Molarity Conversion Factors • A solution is a 3. 0 M Na. OH. • Write the molarity in the form of conversion factors. 3. 0 moles Na. OH and 1 L Na. OH soln 1 L Na. OH soln 3. 0 moles Na. OH