Answer to Question #66603 in Physical Chemistry for murahi

Question #66603

Question 4 : What is the conjugate base of
H
C
O
−
3
HCO3−
?

C
O
2
−
3
CO32−

H
2
C
O
3
H2CO3

OH^{-}

H
C
O
+
3
HCO3+

Question 5 : In the following reaction, which is a Brønsted-Lowry base?
H
C
2
O
−
4
(
a
q
)
+
H
2
O
(
l
)
→
H
3
O
+
(
a
q
)
+
C
2
O
2
−
4
(
a
q
)
HC2O4−(aq)+H2O(l)→H3O+(aq)+C2O42−(aq)

H
3
O
+
H3O+

H
2
O
H2O

None of these

H
C
2
O
−
4
HC2O4−

Question 6 : For the following reaction, which of the following is a conjugate acid-base pair?
H
2
P
O
4
−
(
a
q
)
+
N
H
3
(
a
q
)
→
H
P
O
2
−
4
(
a
q
)
+
N
H
+
4
(
a
q
)
H2PO4−(aq)+NH3(aq)→HPO42−(aq)+NH4+(aq)

None of the above

H
2
P
O
−
4
H2PO4−
and
H
P
O
2
−
4
HPO42−

H
2
P
O
−
4
H2PO4−
and
N
H
3
NH3

HPO42- and NH4+

Expert's answer

CO3^2−
H 2 O
H2PO4^− and HPO4^2−