Question

Chemical formula for calcium pyrophosphate is $C{a}_2{P}_2{O}_7$. The formula for ferric pyrophosphate will be

• A. $F{e}_3(P_2{O}_7{)}_3$
• B. $F{e}_4{P}_4{O}_{14}$
• C. $F{e}_4(P_2{O}_7{)}_3$
• D. $F{e}_{3}P{O}_4$

Answer 1

Answer: (C)

As the formula of calcium pyrophosphate is $C{a}_2{P}_2{O}_7$ means valency of pyrophosphate radical is $-4$ so formula of ferric pyrophosphate is $F{e}_4(P_2{O}_7{)}_3$.