Question

Which of the following best represents the reaction between sulfuric acid and calcium hydroxide? f H2SO4 + 2Ca(OH)2 → 2CaSO4 + 3H2O g H2SO4 + Ca(OH)2 → CaSO4 + 2H2O h HSO4 + CaOH → CaSO4 + H2O j H2SO4 + Ca(OH)2 → CaSO4 + H2O

Answer 1

Answer:

g. H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O.

Explanation:

Sulfuric acid is represented as H₂SO₄ and calcium hydroxide is represented as Ca(OH)₂.

• To balance a chemical reaction. we should apply the law of conservation of mass that the no. of different atoms in both sides (reactants and products).

• The only choice that represent the reactants correctly and apply the law of conversation of mass is:

g. H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O.

f. H₂SO₄ + 2Ca(OH)₂ → 2CaSO₄ + 3H₂O

is not correct that the no. of S, and O is not equal in both reaction sides.

S in reactants (1) while in products (2).

O in reactants (8) while in products (11).

h. HSO₄ + CaOH → CaSO₄ + H₂O

The reactants is represented in a wrong way.

j. H₂SO₄+ Ca(OH)₂ → CaSO₄ + H₂O

is not correct that the no. of H and O is not equal in both reaction sides.

H in reactants (4) while in products (2).

O in reactants (6) while in products (5).

So, the right choice is: g. H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O.