How do you calculate the number of moles of potassium hydroxide that must be dissolved to make the following solution: 500 #cm^3# of 1 #mol##/##dm^3#?

1 Answer
anor277
Sep 20, 2016

We use the relationship, #"Concentration"# #=# #"Moles of solute"/"Volume of solution"#. #0.500*mol# #KOH# are required.

Explanation:

We are given that #"Concentration"# #=# #1*mol*dm^-3#, and that the volume of this solution is #500*cm^3# #=# #0.500*dm^3#.

Thus #"moles of solute"# #=# #"concentration "xx" volume"# #=# #1*mol*cancel(dm^-3)xx0.500*cancel(dm^3)# #=# #0.500*mol#.

What is the mass of the #KOH# used here?

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