16. How many milliliters of a 5% solution of BaCl2•2H2O, taken with a 10% excess, is needed to precipitate a sulfate ion from 10.00 ml of a 5.5% solution of H2SO4 (p = 1.035 g/cm3)? Mol. mass (BaCl2) 208.23; they say mass (H2SO4) 98.07; they say mass (H2O) 18.00.

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