Concentration of Ions in Solutions
chapter 5
lesson 9
Objective
You will be able to use the
formulas learned for
calculating concentrations of
solutions and the dissociation
of compounds to calculate the
concentrations of separate
ions in a solution.
Recall that a solution of copper (II) sulfate
pentahydrate is blue. Why? Discuss with a neighbor.
Write the dissociation equation for the dissolving of
solid copper (II) sulfate pentahydrate.
Write the dissociation equation for each of the above
solutions.
What is the concentration of copper (II) ions in a
0.75 mol/ L solution of copper (II) nitrate?
Step 1: Write the dissociation equation.
Step 2: Calculate the concentration.
What is the concentration of the nitrate ions in the
above solution?
Example
We are given 26.3 g of iron (III) oxide and dissolve this
in enough water to make 500 mL of solution. What is
the concentration of each ion in the solution?
Example
What mass of ammonium sulfate is required to
produce a 200 mL solution with a 1.24 mol/L
concentration of ammonium ions?
Assignment
P. 193 #17-22