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How would you make 50mL of a solution containing 0.25M NaCl and 0.05M MgCl2, starting with solid reagents? How would you make the same solution starting with 5.0M stock solutions of the two reagents? FW's: NaCl, 58.4g/mole: MgCl2 6H2O, 203.3g/mole.

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