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Question
Chemistry
The equivalent weight of phosphoric acid (H3PO4) in the reaction: NaOH+H2PO4 xrightarrowNaH2PO4+H2O is:
Q. The equivalent weight of phosphoric acid
(
H
3
P
O
4
)
in the reaction:
N
a
O
H
+
H
2
P
O
4
N
a
H
2
P
O
4
+
H
2
O
is:
2002
208
BHU
BHU 2005
Report Error
A
59
B
49
C
25
D
98
Solution:
23
+
16
+
1
=
40
1
g
.
e
q
N
a
O
H
+
1
×
3
+
31
+
16
×
4
=
98
1
g
−
e
q
H
3
P
O
4
N
a
H
2
P
O
4
+
H
2
O
∴
equivalent weight of
H
3
P
O
4
is 98 g In the above reaction no change in oxidation state of phosphorus takes place. So, equivalent weight will by equal to its molecular weight.