Question

The two acids H2S04 & H3PO4 are neutralised separately by the same amount of an alkali
when sulphate & phosphate are formed respectively. Find ratio of the masses of H2S04 & H3PO4​

Answer 1

Answer:

H

2

SO

4

+2NaOH→Na

2

SO

4

+2H

2

O

H

3

PO

4

+NaOH→NaH

2

PO

4

+H

2

O

Equivalent of alkali= 1 g equivalent of H

2

SO

4

=1 g equivalent of H

3

PO

4

The two acids must react in the ratio of their equivalent masses.

Equivalent mass of H

2

SO

4

=

2

98

=49

Equivalent mass of H

3

PO

4

=

1

98

=98

Hence ratio of masses of H

2

SO

4

: H

3

PO

4

=49:98=1:2

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