Question

3. Consider the following reaction of sodium
thiosulphate with Cl2:
Na 520, (aq) + 4Cl2(g) + 5H20(1) -
2NaHSO (aq) + 8 HCl(aq)
19.
Choose the correct statement
(1) 0.3 mole of Na S20, is required to react
completely with 0.12 mole of Cl2
(2) 0.24 mole of HCI will form from 0.12 mole of
Cl, on complete reaction
(3) 15 mole of water is required for the reaction of
0.12 mole of Cl2
(4) All are correct
loving has maximum percentage of​

Answer 1

Aqueous solution of Na2​S2​O3​ on reaction with Cl2​ gives NaHSO4​.

The reaction is as follows:

Na2​S2​O3​+4Cl2​+5H2​O→2NaHSO4​+8HCl

Answer 2

The correct statement is option (4)All are correct.

GIVEN

Chemical reaction -

Na₂S₂O₃ + 4Cl₂ + 5H₂O ---------> 2NaHSO₄ + 8 HCl

TO FIND

Which of the statement among the given option is correct?

SOLUTION

We can simply solve the above problem as follows;

We apply the mole ratio to solve.

(1) 0.3 mole of Na₂S₂O₃ is required to react completely with 0.12 mole of Cl₂.

From the balanced equation, we can observe that,

4 moles of Cl₂ require 1 mole of Na₂S₂O₃.

So,

0.12 mole of Cl₂ requires, (1/4)×0.12 = 0.3 moles of Na₂S₂O₃

Hence, Statement 1 is correct.

(2) 0.24 mole of HCI will form from 0.12 mole of Cl₂, on complete reaction.

From the balanced chemical reaction,

Moles of HCl produced from 4 moles of Cl₂ = 8 moles

So,

Moles of HCl produced from 0.12 mole of Cl₂ = 2× 0.12 = 0.24 moles.

Hence, Statement 2 is correct.

(3) 1.5 mole of water is required for the reaction of 0.12 mole of Cl2

From the balanced chemical reaction,

Moles of H₂O required for 4 moles of Cl₂ = 5

So,

moles of H₂O required for 0.12 moles of H₂O = (5/4)× 0.12 = 1.5moles

Hence, Statement 3 is also correct.

Hence, The correct answer is option(4)

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