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2.11g of MgCl2 is added to 30cm3 of water. Find the concentration of chloride ions in the solution.

Mr of MgCl2 = 24.3 + 2(35.5) = 95.3 Moles added = 2.11/95.3 = 0.02214 Mol of cl-  added = 20.02214 = 0.04428 Conc = 0.04428/(3010-3) = 1.48 moldm-3

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