Question

ORAL QUESTIONS ONE WORD ANSWER
1. By what common name are the substances on the left of the arrow in a chemical equation called ?

2. Write the word equation for the reactions: (a) Calcium carbonate and hydrochloric acid to form calcium chloride, carbon dioxide and water. (b) Magnesium burns in carbon dioxide to form magnesium oxide and carbon
(c)Sodium metal reacts with water to give sodium hydroxide and hydrogen gas
(d) Carbon dioxide passed through lime water gives white turbidity due to the formation of calcium carbonate. ​

Answer 1

1. By what common name are the substances on the left of the arrow in a chemical equation called ?

Ans:- Reactants.

2. Write the word equation for the reactions:

(a) Calcium carbonate and hydrochloric acid to form calcium chloride, carbon dioxide and water.

Ans:- 2HCl (aq) + CaCO 3(s) CaCl 2 (aq) + CO 2(g) + H 2 O (l).

(b) Magnesium burns in carbon dioxide to form magnesium oxide and carbon

Ans:-2Mg+CO2 →2MgO+C

(c)Sodium metal reacts with water to give sodium hydroxide and hydrogen gas .

Ans:- 2Na + 2H2O = 2NaOH + H2.

(d) Carbon dioxide passed through lime water gives white turbidity due to the formation of calcium carbonate.

Ans:- When CO2 passes through lime water, it turns it into milky carbonate water due to formation of insoluble carbonate.

4Ca(OH) 2+CO2→CaCO 3 (+)+H2O If CO2 is passes for longer period, turbidity disappears due to form of soluble calcium bicarbonate.

CaCO 3 +H 2o+CO 2 CO2→Ca(HCO 3 ) 2

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Answer 2

ANSWER:

1. Reactants

eactantsThe substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called product's.

PLEASE DON'T MIND I CAN'T DO THE QUESTION NUMBER 2 SORRY.

I AM REALLY SORRY.