Practice Problem [ENDORSED]

[Priscilla Okaiteye]

For the problem: how would you prep a 10mL of ).015M KOH solution starting from solid KOH?
would I have to find the molar mass to answer this question or is it straightforward?

[Isabelle De Rego 1A]

I'm pretty sure that you only have to find the amount of moles of KOH by multiplying the molarity by the volume (don't forget to convert mL to L!)

[Sophie W]

You would need to find molar mass because it's basically asking you how much solid KOH to add to the solution.
You should first find the number of moles needed to make the molarity of the solution (M = # moles/volume, therefore #moles= M*volume--remembering to convert mL to L).
Then you should multiply that number by the molar mass to find the mass of the solid to add!