Question

The conjugate base of $H_2PO_4^ -$ is

• A. $PO_4^{ 3-}$
• B. $HPO_4^{ 2-}$
• C. $H_3PO_4$
• D. $P_2O_5$

Answer 1

Answer: (B)

$HPO_4^{ 2-}$

Answer 2

$\because 6.02??0^{+20}$ molecules of urea is present in $= \frac{0.0001\times1000}{100} = 0.01 M$