What volume of a 1.5M KOH soltion is needed to provide 3.0 moles of KOH?
Answer:
v=concentartion multiplied by mole
so
3.0*1.5=4.5
i hope you are ok!
You need exactly 2 litres.
1.5M means a concentration of 1.5 moles per litre.
1.5 x 2 = 3 moles.
the formula for Molarity is:
M = mol solute / L solution
so if you are looking for the volume of KOH solution, that would be:
1.5 M KOH = 3.0 mol KOH / L solution
L solution = 2.0 L or 2000 mL
You need to understand what 1.5 M means.
1.5 Molar means that the solution contains 1.5 moles of the substance per liter of solution.
You want 3.0 Moles...isn't the answer obvious now?
concentration = moles / volume
by rearranging this equation you find that
volume = moles / concentration
you are already given -
moles of KOH = 3.0
concentration of KOH = 1.5M
putting these values into the formula you get
volume = 3 / 1.5 = 2 L
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