(a) A KCl solution is prepared by mixing 8g of NaCl (MW=58.5g/mol) with 250mL of H2O. Calculate the molarity. (b) A KCl solution is prepared by mixing 5g of KCl with 200g of H2O. Calculate the percent (m/m) of the solution.
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Given: Mass of NaCl = 8g Molecular weight of NaCl = 58.5g/mol Volume of solution = 250mL = 0.25L Molarity (M) = (mass of solute / molecular weight) / volume of solution Molarity (M) = (8g / 58.5g/mol) / 0.25L Molarity (M) = 0.137 Therefore, the molarity of the Show more…
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