A solution of 20.0 g of which hydrated salt dissolved in 200 g H2O will have the lowest freezing point? | Solutions

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Question

A solution of 20.0 g of which hydrated salt dissolved in 200 g H₂O will have the lowest freezing point?

CuSO₄ • 5 H₂O (M = 250)

NiSO₄ • 6 H₂O (M = 263)

MgSO₄ • 7 H₂O (M = 246)

Na₂SO₄ • 10 H₂O (M = 286)

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