Question

(a) Substitute formulae for names and balance the following equation
Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.
(b) Write balanced chemical equation with state symbols for the following reaction
Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water.

Answer 1

a) CaCO3 + HCl gives CaCl2 + H2O + CO2

b) NaOH(s) + HCl(aq) gives NaCl(s) + H2O

Answer 2

Explanation:

(a) Chemical equation:

$O_{3(s)}+H C l_{(l)} \rightarrow C a C l_{(s)}+H_{2} O_{(l)}+C O_{2(g)}$

In this reaction, calcium chloride is the major product. The above given process is a neutralization process as calcium carbonate is a base and hydrochloric acid is an acid (obviously!). It a white salt and widely used in food preservation.

(b) Balanced chemical reaction:

$N a O H_{(S)}+H C l_{(l)} \rightarrow N a C l_{(s)}+H_{2} O_{(l)}$

The sodium chloride is the major product in the above reaction. This is an ionic compound and which is well known for the presence of sodium and chloride in 1:1 ratio. This is an edible salt and known as table salt. It is also used in de-icing of road during winter season.