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  4. Which has maximum number of millimoles of Cl - ion?

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Q. Which has maximum number of millimoles of $Cl ^{-}$ ion?

Some Basic Concepts of Chemistry

Solution:

(a) $0.208 \,g \,BaCl _2=\frac{0.208}{208}$ mole
$=1 \times 10^{-3}$ mole
$=1$ millimole $BaCl_2$
$=2$ millimoles $Cl^-$
(b) $0.1$ millimoles $BaCl$
$=100 \times 0.2$ millimoles $Cl ^{-}$
$=20$ millimoles
(c) $0.745 \,g \,KCl =\frac{0.745}{74.5} mole\, KCl _2$
$=0.01$ mole
$=0.01 \times 1000$ millimoles
$=10$ millimoles