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To reduce alkalinity from 320 (6.4 meq/L) to 40 (0.8 mEq/L) you will need 6.4 - 0.8 = 5.6 mEq/L protons. I assume your finding that 1.5 mL of CRS will do this for you comes from the Brupaks table. Thus tells us that the normality of CRS is 5.6/1.4 = 4 N (a nice round number). Now we know that CRS is equimolar HCl and H2SO4 so that 2/3 of the protons (8/3 ...



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