Ch.4 - Chemical Quantities & Aqueous ReactionsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds
Solubility Rules
Molecular Equations
Gas Evolution Equations
Solution Stoichiometry
Complete Ionic Equations
Calculate Oxidation Numbers
Redox Reactions
Balancing Redox Reactions: Acidic Solutions
Balancing Redox Reactions: Basic Solutions
Activity Series
Additional Practice
Types of Chemical Reactions
Normality & Equivalent Weight
Additional Guides
Oxidation Reduction (Redox) Reactions
Oxidation Number
Net Ionic Equation

Osmolarity (ionic molarity) represents the number of moles of ions per liter of solution. 


Concept #1: Method 1: 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

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?

Practice: Which of the following solutions will have the highest concentration of bromide ions?

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 GaBrsolution?