Question

${Pb_3 O_4 + 4HNO_3 -> 2Pb(NO_3)_2 + PbO_2 + 2H_2O }$ Which is true about the lead ions in ${Pb_3O_4}$ ?

• A. $\ce{Pb^{2+}}$ reacts with $\ce{HNO_3}$ to give lead nitrate.
• B. $\ce{Pb^{4+}}$ reacts with $\ce{HNO_3}$ to give lead nitrate.
• C. $\ce{Pb^{2+}}$ reacts with $\ce{HNO_3}$ to give $\ce{PbO_2}$
• D. $\ce{Pb^{4+}}$ reacts with $\ce{HNO_3}$ to give $\ce{PbO_2}$

Answer 1

Answer: (A)

$\ce{Pb^{2+}}$ reacts with $\ce{HNO_3}$ to give lead nitrate.

Answer 2

${Pb_3O_4}$ is a mixture of ${PbO_2 + PbO}$ and only ${PbO } i.e., {Pb^{2+}}$ reacts with ${HNO_3}$ to form ${Pb(NO_3)_2}$.