Name: ____________________________________________ Period: __________ Date: __________________
Learning Target:
I can describe the unique role of water in chemical and biological systems.
Criteria for Success:
I can describe the terms dissociation and ionization.
I can write equations for the dissolution of soluble ionic compounds in water.
Dissolution of Soluble Ionic Compounds
A. When an ________________ compound made of ________________ dissolves in water, the _______________
_________________________ from one another. This is called _____________________________.
1. The number of ______________ produced in solution depends upon the ratio in the original formula.
a. In the following equation, ______ formula unit of NaCl forms ______ Na1+ ion and ______ Cl1- ion in
solution. OR ________ mole of NaCl forms ______mol of Na1+ ions and _____ mol of Cl1- ion in solution.
H2O
NaCl(s) → Na1+(aq) + Cl1-(aq)
b. In the following equation, ______ formula unit of CaCl2 forms ______ Ca2+ ion and ______ Cl1- ion in
solution. OR _______ mole of CaCl2 forms ______mol of Ca2+ ions and ______ mol of Cl1- ion in solution.
H2O
CaCl2(s) → Ca2+(aq) + 2Cl1-(aq)
B. Some _________________________ (covalent) compounds can also form ____________ in solution. Usually, these
compounds are ____________________.
1. ________________________________ is the term for the creation of ions where there were none.
a. The following equation describes the ________________________ of HCl.
H2O
HCl(g) → H1+(aq) + Cl1-(aq)
b. It is important to note that the hydrogen ion attracts other molecules so strongly it doesn’t usually
exist ______________________. It is better described as being completely transferred to a water
molecule, where it becomes covalently bonded to oxygen and forms, _________________________.
HCl(g) + H2O(l) → H3O1+(aq) + Cl1-(aq)
Guided Practice
1-3 Write the equation for the dissolution of aluminum sulfate in water. If 1.00mol of aluminum sulfate is dissolved:
1. How many moles of aluminum ions are produced?
2. How many moles of sulfate ions are produced?
3. What is the total number of moles of ions produced by dissolving 1.00 mol of aluminum sulfate?
4-6 Write the equation for the dissolution of ammonium nitrate in water. If 3.50 mol of ammonium nitrate are dissolved:
4. How many moles of ammonium ions are produced?
5. How many moles of nitrate ions are produced?
6. What is the total number of moles of ions produced by dissolving 3.50 mol of ammonium nitrate?
7-8 Calculate the number of moles of ions in a solution produced by dissolving 60.0 g of HNO3 in 600mL of water.
7. How many moles of hydrogen ions?
8. How many moles of nitrate ions?
Independent Practice
9-11 Write the equation for the dissolution of magnesium chlorate in water. If 1.00mol of magnesium chlorate is dissolved:
9. How many moles of magnesium ions are produced?
10. How many moles of chlorate ions are produced?
11. What is the total number of moles of ions produced by dissolving 1.00 mol of magnesium chlorate?
12 An aqueous solution is analyzed and found to contain potassium ions and sulfite ions. Write the equation for the
dissolution of the salt that produced this solution. If the solution contains 0.50mol of potassium ions, how many moles
of sulfite ions are present?
13-14 Write the equation for the dissolution of each of the following in water, and then indicate the total number of
moles of solute ions formed.
13. 0.276 mol potassium sulfide
14. 0.107 mol aluminum sulfate
15 Write the equation for the dissolution of NH4NO3 in water. If 4.17 mol of NH4NO3 are dissolved, how many total
moles of ions are produced?