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Standard XII
Chemistry
Introduction to E2 Mechanism
75 What is th...
Question
75 What is the normality of 0.3 M H3PO4, When it undergoes the reaction as: H3PO4+2OH- reacts to HPO32-+2H2O
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Q.
What is the normality of
0.3
M
H
3
P
O
4
when it undergoes the reaction as?
H
3
P
O
4
+
2
O
H
−
→
H
P
O
2
−
3
+
2
H
2
O
.
Q.
Equivalent weight of
H
3
P
O
4
in each of the reaction will be respectively:
H
3
P
O
4
+
O
H
−
→
H
2
P
O
−
4
+
H
2
O
H
3
P
O
4
+
2
O
H
−
→
H
P
O
2
−
4
+
2
H
2
O
H
3
P
O
4
+
3
O
H
−
→
P
O
3
−
4
+
3
H
2
O
Q.
In given reactions what are the eq.weight of H
3
PO
4
?
(1)H
3
PO
4
+ OH
-
= H
2
PO
4
+ H
2
O
(2)H
3
PO
4
+ 2OH
-
= HPO
4
2-
+ H
2
O
(3)H
3
PO
4
+ 3OH
-
= PO
4
3-
+ 3H
2
O
Q.
If
1
mole of
H
3
P
O
4
is reacted with
1
mole of
X
(
O
H
)
2
as:
H
3
P
O
4
+
X
(
O
H
)
2
→
X
H
P
O
4
+
2
H
2
O
, then:
Q.
The equivalent weight of H3PO4 in following reaction
H3PO4 + Ca(OH)2 ---> CaHPO4 +2 H2O
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