Asked by Anonymous

i measured out 2 different tared mass of TUMS sample. One is 0.1554g and the other 0.1546g.

Then i did two titrations with the conclusion of one being 17.91mL of NaOH and the other 17.47mL

my question is: "if you consumed two 1.00g tablets of TUMS, how many moles of acid would be neutralized"??

this is a back titration of standardized HCl with Sodium Hydroxide solution
Answered by DrBob222
You didn't provide the volume or M of the HCl and you must have that to answer this question.
You added an excess of HCl. How much HCl did you add? moles HCl = M x L = ?
Then you back titrated with NaOH. mols NaOH = M x L = ?
The difference in moles = moles of acid consumed by the TUMS. I would calculate each titration separately and divide the final result of each by the mass of the original sample which should give you moles H^+/grams and that times 2 will give moles/2 grams.
Answered by Anonymous
the volume and M of HCl is 0.1312M and 150mL

how do i find then excess of HCl
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