If 1 antacid tab neutralizes 6.84 mmol of HCL (36.46 g/mol). How many tabs are needed to neutralize 125 mL of stomach acid. Assume [H3O+] = 0.10 mmol/mL.

Question

I have no idea where to go with this. Any formula would help

Answer 1

How much acid do you have in 125 mL of 01M acid? That's 125 mL x 0.1M = 12.5 mmols.
6.84 mmols/tab x # tablets = 12.5 mmols.
Solve for # tablets

Answer 2

Thanks so much. I had come up with 12.5 mmols, but didn't know what to do with it.