A.) Gary the general chemist added an extra 10mL of water to his Erlenmeyer flas

Question

A.) Gary the general chemist added an extra 10mL of water to his Erlenmeyer flask after the addition of the nitric acid to the antacid tablet. How would this affect his results (i.e. would the calculated mass of antacid be high, low or unchanged?) Explain your reasoning.

B.) Tina the titrating student did not completely dissolve her antacid tablet prior to beginning the titration and still had some chunks of tablet in her solution at the end of her titration. How would this affect her results (i.e. would the calculated mass of antacid be high, low or unchanged?) Explain your reasoning.

Explanation / Answer

For question A) The calculated mass of the antiacid would be the same. All you did was dilution your antiacid solution even more. The only thing that the extra 10 mL will affect is the amount of time titrating nitric acid into the flask.

B) The calculated mass would be low simply because the chunks of tablet were not completely dissolved into the solution. You need the tablet to dissolve completely so you can have an overall concentration of antiacid and water in flask. Chunks of antiacid are not apart of the titration.

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