Ion concentration

Question 1

Define common ion

Answer 1

an ion present in both SOLUTES (ex. KCl + CaCl2, chloride is the common ion)

Question 2

Define dissociation/ ionization equation

Answer 2

Shows how an ionic compound breaks apart (dissociates/ionizes) into its ions when it dissolves in water or another solvent.

ex.AB → A⁺ + B⁻

Question 3

Find the concentration of each type of ion in a 0.200 mol/L magensium nitrate solution

Answer 3

single solute problem since it contains 1 solute

1.write the dissociation eq
2. multiply original concentration [ ] by the ions coefficiant

Question 4

Calculate the chloride concentration when a solution of 19.8g of KCl dissolved in 100 mL of water is mixed with a solution of 26.5g of CaCl2 dissolved in 150 mL of water.

Answer 4

1.determine mols of each solute
2. use dissociation eq to solve for mols of cl- in each
3. [cl-] = total mols cl-/total volume (v1 + v2)