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One litre each of 1M Al(2)(SO(4))(3) and...

One litre each of `1M Al_(2)(SO_(4))_(3)` and `1M BaCl_(2)` are mixed. What is the molarity of sulphate ions in the resultant solution?

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The correct Answer is:
1
eq `Al_(2)(SO_(4))=1xx1xx6=6eq`.
eq. `BaCl_(2)=1xx1xx2=2eq`.
`therefore eq [SO_(4)^(2-)]` left `=6-2=4` eq
`therefore [SO_(4)^(2-)]=(4)/(2)=2N=1M`
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