How many gram ions of $S O_{4}^{2 -}$ are present in $1$ gram molecule of $K_{2} S O_{4} . A l_{2} (S O_{4})_{3} .24 H_{2} O$ ?

1

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9

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4

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7

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Solution

The correct option is C $4$
The total number of $S O_{4}^{2 -}$ ions present in $1$ formula of unit of $K_{2} S O_{4} . A l_{2} (S O_{4})_{3} .24 H_{2} O = 4$ .
So, the total number of gram ions of $S O_{4}^{2 -}$ ions present in $1$ gram molecule of $K_{2} S O_{4} . A l_{2} (S O_{4})_{3} .24 H_{2} O = 4$

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