Sulphuric acid and orthophosphoric acid have the same molecular mass. Ratio of the masses of these acids needed to neutralise the same amount of an alkali if the sulphate and dihydrogen orthophosphate were formed is

Question

Sulphuric acid and orthophosphoric acid have the same molecular mass. Ratio of the masses of these acids needed to neutralise the same amount of an alkali if the sulphate and dihydrogen orthophosphate were formed is (A) 1: 2 (B) 2: 1 (C) 1: 3 (D) 1: 1

Tardigrade Admin · Accepted Answer

H2SO4+2OH- → SO2-4+2H2O H3PO4+OH- → H2PO-4+H2O For same amount of alkali, H2SO4 and H3PO4 required are in the ratio 1 :2 (by number of moles or by weight)

Q. Sulphuric acid and orthophosphoric acid have the same molecular mass. Ratio of the masses of these acids needed to neutralise the same amount of an alkali if the sulphate and dihydrogen orthophosphate were formed is

1 : 2

2 : 1

1 : 3

1 : 1

$H_{2} S O_{4} + 2 O H^{-} \to S O_{4}^{2 -} + 2 H_{2} O$
$H_{3} P O_{4} + O H^{-} \to H_{2} P O_{4}^{-} + H_{2} O$
For same amount of alkali, $H_{2} S O_{4}$ and $H_{3} P O_{4}$
required are in the ratio $1 : 2$ (by number of moles or by weight)

Q. Sulphuric acid and orthophosphoric acid have the same molecular mass. Ratio of the masses of these acids needed to neutralise the same amount of an alkali if the sulphate and dihydrogen orthophosphate were formed is

1 : 2

2 : 1

1 : 3

1 : 1

H2​SO4​+2OH−→SO42−​+2H2​O H3​PO4​+OH−→H2​PO4−​+H2​O For same amount of alkali, H2​SO4​ and H3​PO4​ required are in the ratio 1:2 (by number of moles or by weight)

$H_{2} S O_{4} + 2 O H^{-} \to S O_{4}^{2 -} + 2 H_{2} O$
$H_{3} P O_{4} + O H^{-} \to H_{2} P O_{4}^{-} + H_{2} O$
For same amount of alkali, $H_{2} S O_{4}$ and $H_{3} P O_{4}$
required are in the ratio $1 : 2$ (by number of moles or by weight)