What mass of salt is contained in a #200*mL# volume of solution that is #0.10*mol*L^-1# with respect to #KCl(aq)#?

1 Answer
Sep 11, 2017

Answer:

Approx. #1.5*g# with respect to the salt.....

Explanation:

By definition, #"concentration"="quantity of stuff (mole or grams)"/"volume of solution"#

We have #200*mL# volume of #KCl(aq)# that is #0.1*mol*L^-1# with respect to potassium chloride.....

And so we take the product, and remember that #1*mL-=1xx10^-3*L#, and so.....

#200*cancel(mL)xx0.10*mol*cancel(L^-1)xx10^-3*cancelL*cancel(mL^-1)=#

#=20.0xx10^-3*mol#

But potassium chloride has a molar mass of #74.55*g*mol^-1#

And so we got a mass of.....

#20.0xx10^-3*molxx74.55*g*mol^-1=??*g#