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Stoichiometric Calculations

H2C2O4 and ...

Question

$H_{2} C_{2} O_{4}$ and $N a H C_{2} O_{4}$ behave as acids as well as reducing agents. Which of the following statements are correct?

A

Equivalent weights of

H_{2} C_{2} O_{4}

and

N a H C_{2} O_{4}

are equal to their molecular weights when acting as reducing agents

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B

Equivalent weights of

H_{2} C_{2} O_{4}

and

N a H C_{2} O_{4}

are equal to half their molecular weights when acting as reducing agents

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C

100

mL of

1 M

solution of each is neutralized by equal volumes of

1 N C a (O H)_{2}

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D

100

mL of

1 M

solution of each is oxidized by equal volumes of

1 M

K M n O_{4}

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Solution

The correct options are
B Equivalent weights of $H_{2} C_{2} O_{4}$ and $N a H C_{2} O_{4}$ are equal to half their molecular weights when acting as reducing agents
C $100$ mL of $1 M$ solution of each is oxidized by equal volumes of $1 M$ $K M n O_{4}$
$H_{2} C_{2} O_{4}$ : As acid, $n = 2$
As reducing agent, $n = 2$
$N a H C_{2} O_{4}$ : As acid, $n = 1$
As reducing agent, $n = 2$
$E_{H_{2} C_{2} O_{4}}]_{as reducing agent} = \frac{M}{2}$ ;
$E_{N a H C_{2} O_{4}}]_{as reducing agent} = \frac{M}{2}$
On reaction with $K M n O_{4}$
$H_{2} C_{2} O_{4}$ and $N a H C_{2} O_{4}$ : both are acting as reducing agents with same $n$ factor of $2$ .
mEq of $K M n O_{4}$ = mEq of $H_{2} C_{2} O_{4}$
mEq of $K M n O_{4}$ = mEq of $N a H C_{2} O_{4}$
Hence options B & D are correct.

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Similar questions

N a H C_{2} O_{4}

behaves as a reducing agent. Its equivalent weight is:

Q. A mixture of

N a H C_{2} O_{4}

K H C_{2} O_{4} . H_{2} C_{2} O_{4}

required equal volumes of

0.2 N

K M n O_{4}

and 0.12 N NaOH separately. What is the molar ratio of

N a H C_{2} O_{4}

K H C_{2} O_{4} . H_{2} C_{2} O_{4}

in the mixture?

N a_{2} C_{2} O_{4}

K H C_{2} O_{4} . H_{2} C_{2} O_{4}

are mixed in such a proportion by weight that the normality of the resulting solution as a reducing agent is

3.62

times the normality as an acid. What is the proportion?

[Multiply your answer by 100].

Q. An equal volume of a reducing agent is titrated separately with

1 M

K M n O_{4}

in acidic, neutral and alkaline medium. The volumes of

K M n O_{4}

20

33.3

mL in neutral and

100

mL in alkaline medium. Find out the volume of

1

K_{2} C r_{2} O_{7}

consumed if the same volume of the reducing agent is titrated in acidic medium.

Q. A mixture of

H_{2} C_{2} O_{4}

N a H C_{2} O_{4}

2.02

g was dissolved in water and the solution made upto one litre.

10

mL of this solution required

3

0.1 N N a O H

solution for complete neutralization. In another experiment,

10

mL of the same in hot dilute

H_{2} S O_{4}

medium required

4

0.1 N K M n O_{4}

for complete neutralization. Calculate the mass of

N a H C_{2} O_{4}

in mixture (as nearest integer).

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