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)

Question 7

Write the ionic equation of the chemical reaction below:
barium nitrate + sodium sulfate -> barium sulfate + sodium nitrate

Answer 7

Ba2+ (aq) + SO4^2- (aq) -> BaSO4 (s)

Question 8

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

Answer 8

CuO (s) + 2H+ (aq) -> Cu2+ (aq) + H2O (l)

Question 9

Write the ionic equation of the chemical reaction below:
powdered limestone added to dilute hydrochloric acid.

Answer 9

Ca(CO3)2 (s) + 2H+ (aq) -> Ca2+ (aq) + CO2 (g) + H2O (l)

Question 10

Write the ionic equation of the chemical reaction below:
a precipitate of barium sulfate is formed when two solutions of sulfuric acid and barium nitrate are mixed.

Answer 10

SO4^2- (aq) + Ba2+ (aq) -> BaSO4 (s)

Question 11

Write the ionic equation of the chemical reaction below:
magnesium + sulfuric acid -> magnesium sulfate + hydrogen

Answer 11

Mg (s) + 2H+ (aq) -> Mg2+ (aq) + H2 (g)

Question 12

Write the ionic equation of the chemical reaction below:
ammonium chloride + calcium hydroxide -> calcium chloride + ammonia + water

Answer 12

NH4+ (aq) + OH- (aq) -> NH3 (g) + H2O (l)

Question 13

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

Answer 13

Al2O3 (s) + 6H+ (aq) -> 2Al^3+ (aq) + 3H2O (l)

Balanced equation: Al2O3 (s) + 6HNO3 (aq) -> 2Al(NO3)3 (aq) + 3H2O (l)

Question 14

Write the ionic equation of the chemical reaction below:
hydrochloric acid + barium hydroxide -> barium chloride + water

Answer 14

H+ (aq) + OH- (aq) -> H2O (l)