Question

Balance the following reaction. A coefficient of "1" is understood. Choose option "blank" for the correct answer if the coefficient is "1".
KI + Pb(NO3)2 → PbI2 + KNO3

Answer 1

Answer : To balance a chemical equation you need to find the same number of molecules on both the sides of the reaction.

Here in the reaction ;

$KI + Pb (NO_{3})_{2}----\ \textgreater \ Pb I_{2} + KNO_{3}$

here we can see that I is not balanced so we need to balance that,
also nitrate is unbalanced we need to work on that as well.

so on solving we get,
$2KI + Pb (NO_{3})_{2}----\ \textgreater \ Pb I_{2} + 2KNO_{3}$