Ionic Equation

Question 1

What is the function of an ionic equation?

Answer 1

It is to show ions that have undergone a chemical reaction only.

Question 2

Describe the solubility of the following ions.
1: NO3 ^-
2: SO4 ^2-
3: CO3 ^2-
4: O ^2-
5: OH ^-
6: PO4 ^3-
7: Cl ^-
8: Br ^-
9: I ^-
10: sodium salts
11: potassium salts
12: ammonium salts

Answer 2

1: All nitrates are soluble.
2: All sulfates are soluble except lead sulfate (Pb ^2+), barium sulfate (Ba ^2+), and calcium sulfate (Ca ^2+).
3: All carbonates are insoluble except Na+, K+ and NH4+.
4: All oxides are insoluble except Na+ and K+.
5: All hydroxides are insoluble except Na+ and K+. Ba ^2+ and Ca ^2+ are slightly soluble.
6: All phosphates are insoluble except Na+, K+ and NH4+.
7: All chlorides are soluble except Ag+ and Pb 2+.
8: All bromides are soluble except Ag+ and Pb 2+.
9: All iodides are soluble except Ag+ and Pb 2+.
10: All sodium salts are soluble.
11: All potassium salts are soluble.
12: All ammonium salts are soluble.

Question 3

Write the ionic equation of the chemical reaction below:
calcium carbonate + hydrochloric acid -> calcium chloride + water + carbon dioxide

Answer 3

CaCO3 (s) + 2H+ (aq) -> Ca ^2+ (aq) + H2O (l) + CO2 (g)

Question 4

With state symbols, write the balanced equation and ionic equation when sulfur trioxide reacts with aqueous sodium hydroxide.

Answer 4

Balanced equation:
SO3 (g) + 2NaOH (aq) -> Na2SO4 (aq) + H2O (l)
Ionic equation:
SO3 (g) + 2OH- (aq) -> SO4^2- (aq) H2O (l)

Question 5

Write the ionic equation of the chemical reaction below:
calcium oxide + water -> calcium hydroxide

Answer 5

CaO (s) + H2O (l) -> Ca 2+ (aq) + 2OH- (aq)

Question 6

Write the ionic equation of the chemical reaction below:
calcium oxide + nitric acid -> calcium nitrate + water

Answer 6

CaO (s) + 2H+ -> Ca2+ (aq) + H2O (l)