Practice: Which of the following solutions will have the highest concentration of bromide ions?
Osmolarity (ionic molarity) represents the number of moles of ions per liter of solution.
Osmolarity
Concept #1: Method 1: Direct Calculation of Osmolarity
Direct Calculation of Osmolarity:
Example #1: Calculate the molarity of chloride ions when dissolving 58.1 g AlCl3 in enough water to make 500 mL of solution.
Concept #2: Method 2: Osmolarity from Molarity
Osmolarity from Molarity of compound:
Example #2: What is the concentration of hydroxide ions in a 0.350 M solution of gallium hydroxide, Ga(OH)3?
Example #3: How many moles of Ca2+ ions are in 0.120 L of 0.450 M Ca3(PO4)2 solution?
Using Molarity of compounds and L of solutions, moles of ions can be calculated.
Practice: How many milligrams of nitride ions are required to prepare 820 mL of 0.330 M Ba3N2 solution?
Practice: How many bromide ions are present in 65.5 mL of 0.210 M GaBr3 solution?