1.

Which soluton order is correct

Answer»

`BaSO_(4)ltSrSO_(4)ltCaSO_(4)ltMgSO_(4)`
`ZnSltNa_(2)Na_(2)SltCoS`
`BaCO_(3)ltMgCO_(3)ltNa_(2)CO_(3)`
`KOHltNaOHltMg(OH)_(2)`

ANSWER :D


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