Question

Mass of tablet: 1.4930g
Volume of HCL added: 100ml
Find the milimoles of HCL added

I have many questions similar to this, could someone explain how to do this...do I just find the # of moles regularly and multiply by 1000?

any help would be much appreciated

Answer 1

btw mililoles: mmoles right?

Answer 2

To find the number of millimoles (mmoles) you need the volume and concentration of HCl. So of the concentration of HCl is 0.01 M and the volume is 25 ml then the number of moles is

(25 ml /1000 ml l^-1)x(0.01 mol l^-1)moles =

which you then multiply by 1000 mmoles mole^-1 to get mmmoles = 0.25 mmoles.

It is worth noting that if you are working in ml and mole l^-1 then when you multiply ml by mole l^-1 the answer is in mmoles

Does this help?

Answer 3

thanks for the help!