Question

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Answer 1

Answer:

Theory :

• 1. The molarity of hydrochloric acid is determined by titrating it against the standard solution of sodium carbonate using methyl orange as indicator.

• 2. Strength of the acid is determined by multiplying its molarity with its molecular mass which is 36.5.

Chemical Equation :

→ Na2 CO3 (aq) + 2HCl (aq)  ⇾ 2NaCl(aq) + CO2(g) + H2O(l)

→ Indicator ⇢ Methyl orange.

.

.

Observations  :

• Molarity of Na2CO3 solution = 0.05 M

• Volume of Na2CO3 solution taken in each titration = 20.0 ml.

Answer 2

Theory :

1. The molarity of hydrochloric acid is determined by titrating it against the standard solution of sodium carbonate using methyl orange as indicator.

2. Strength of the acid is determined by multiplying its molarity with its molecular mass which is 36.5.

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Chemical Equation :

→ Na2 CO3 (aq) + 2HCl (aq) ⇾ 2NaCl(aq) + CO2(g) + H2O(l)

→ Indicator ⇢ Methyl orange.

.

.

Observations :

Molarity of Na2CO3 solution = 0.05 M

Volume of Na2CO3 solution taken in each titration = 20.0 ml.