The chemical formula for calcium pyrophosphat | vedclass

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(C) The formula of calcium pyrophosphate is $Ca_2P_2O_7$. In this compound,the calcium ion is $Ca^{2+}$. Since there are two $Ca^{2+}$ ions,the total

Vedclass · Accepted Answer

$Fe_4(P_2O_7)_3$

Vedclass · Answer

(C) The formula of calcium pyrophosphate is $Ca_2P_2O_7$. In this compound,the calcium ion is $Ca^{2+}$. Since there are two $Ca^{2+}$ ions,the total positive charge is $+4$. Therefore,the pyrophosphate radical $(P_2O_7)$ must have a valency of $-4$,i.e.,$(P_2O_7)^{4-}$. Ferric ion is $Fe^{3+}$. To balance the charges in ferric pyrophosphate,we use the criss-cross method: $Fe^{3+}$ and $(P_2O_7)^{4-}$ combine to form $Fe_4(P_2O_7)_3$.

Isotope	Isotopic molar mass $(g \, mol^{-1})$	Abundance (%)
$^{36}Ar$	$35.96755$	$0.337$
$^{38}Ar$	$37.96272$	$0.063$
$^{40}Ar$	$39.9624$	$99.600$

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

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Assertion : Equivalent weight of a base $= \frac{\text{Molecular weight}}{\text{Acidity}}$
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Use the data given in the following table to calculate the molar mass of naturally occurring argon isotopes:

Isotope Isotopic molar mass $(g \, mol^{-1})$ Abundance (%)

$^{36}Ar$ $35.96755$ $0.337$

$^{38}Ar$ $37.96272$ $0.063$

$^{40}Ar$ $39.9624$ $99.600$

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