Question

the reaction between lead nitrate and potassium iodine present in aqueous solutions is an example of:
a)decomposition reaction.
b)displacement reaction.
c)double displacement reaction.
d) neutralization reaction.

Answer 1

Answer:

the right answer is(c)double displacement reaction

Answer 2

Answer:

The correct option is (c) Double displacement reaction.

Explanation:

In a double displacement reaction, two compounds react by exchanging ions to give out two different compounds as follows-

$AB + CD$ → $AC+BD$

Lead nitrate reacts with potassium iodide to give lead iodide and potassium nitrate.

$Pb(NO_{3})_{2}_{(aq)} + 2KI_{(aq)}$ → $2KNO_{3}_{(aq)}+ PbI_{2}_{(s)}$

$Pb^{+2}_{aq}+2NO^{-}_{3}_{(aq)}+2K^{+}_{(aq)}+2I^{-}_{(aq)}$ → $2K^{+}NO^{-}_{3}_{(aq)} +Pb^{+2}I^{-}_{2} _{(s)}$

We see that there is an exchange of ions; hence, it is a double displacement reaction.

Conclusion:

The reaction between lead nitrate and potassium iodine present in aqueous solutions is an example of a double displacement reaction.