Question

I'm doing a chemistry experiment where I add water and vinegar to a beaker and then add Alka Seltzer. I weigh the solution before and after adding the Alka Seltzer. The other information I have is:

Initial Mass (vinegar, water, beaker, Alka Seltzer tablet)- 123.000g
Final Mass- 122.318
Mass of CO_2 evolved- 0.682
Moles CO_2 evolved- 0.015

I have completed the experiment up to the last question which I am totally lost on:

Calculate the number of moles of NaHCO_3 that reacted in each beaker. (The molar ratio between evolved CO_2 and the bicarbonate is 1:1).

Thanks in advance!!

Answer 1

if the mole ratio of CO2 to NaHCO3 is 1:1, then the moles of NaHCO3 used will be equal to the moles of CO2 generated

Answer 2

Oh my goodness, DUH. So the moles of NaHCO3 is 0.015?

Answer 3

yup