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  4. Chemical formula for calcium pyrophosphate is Ca2P2O7. The formula for ferric pyrophosphate will be

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Q. Chemical formula for calcium pyrophosphate is $Ca_2P_2O_7$. The formula for ferric pyrophosphate will be

Chemical Bonding and Molecular Structure

Solution:

As the formula of calcium pyrophosphate is $Ca_2P_2O_7$ means valency of pyrophosphate radical is $-4$ so formula of ferric pyrophosphate is $Fe_4(P_2O_7)_3$.