Chemistry, asked by sakshamchawla2911, 1 year ago

A certain aqueous solution contains three oroacids of phosphorus : X, Y and Z. Acid X is 4.58% hydrogen and 46.9% phosphorus by mass; acid Y is 37.8%
phosphorus by mass; the total number of atoms in a molecule of Z is 14.3% greater than in a molecule of Y. (Atomic mass, H = 1,0 - 16, P = 31)
Which of the following is correct regarding oxoacid X ?
Options
OA)
It is tribasic
Ов)
Its equivalent mass is equal to molecular mass
Oc)Only one H-atom is bonded to phosphorus atom
OD)
It is called as orthophosphoric acid​

Answers

Answered by ZahidxAkash
0

Answer:

B) Its equivalent mass is equal to molecular mass.

Explanation:

Let, Molecular weight of X= M

Here,

Mass of Oxygen in X=100-(46.9+4.58)%

=48.52%

From given information, we can say, for Phosphorus,

(31/M)=0.469

or, M= 31/0.469

or, M=66

So, the molecular weight of X is 66g.

For Oxygen, (16n/66)=0.4852

or, 16n= 32

or, n= 2

For Hydrogen, (n/66)= 0.0458

or, n= 3

So, the acid is H3PO2 (Hypophosphorus Acid)

The Equivalent mass and molecular mass both are 66g for H3PO2.

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