The second reaction, (b), which is the one for the preparation of household bleach, is balanced.
Work Step by Step
(a) The number of hydrogens is not equal. The reactants have 8 "H", and the products have 6 "H". The number of oxygens is not equal to. (b) Each side has 2 sodiums, 2 oxygens, 2 hydrogens and 2 chlorines.