For the given chemical equation, balanced equation with proper coefficients is 2Na₂HPO₄ → Na₄P₂O₇ + H₂O.
Balanced chemical equations are those equations in which each element of reactants and products are present in equal amount on both side of the chemical reaction.
Given chemical reaction is:
Na₂HPO₄ → Na₄P₂O₇ + H₂O
In the above reaction all elements are not present in same quantity on either side, so we can balance the equation by multiply with coefficient 2 on the reactant side as below:
2Na₂HPO₄ → Na₄P₂O₇ + H₂O
Now the above reaction is balanced as all elements are present in qual amount.
Hence we will use coefficient 2 on the reactant side only.
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