Lara S.

asked • 04/14/19

Back-titration - Milk of Magnesia

For one trial of a back titration of a 2g sample of mg(OH)2, 60mL of 0.1N HCl is used to dissolve the Mg(OH)2 sample and the pH is tested to be around pH 4, then the excess HCl is back-titrated with 5mL of 0.1 NaOH to a pink endpoint. For the next trial the mass of Mg(OH)2 is increased to 2.1150g. If the volume of HCl used is the same as the first trial, would the volume of NaOH increase or decrease?

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