Answer:
Explanation:
We want 4M, or 4 moles/liter. 4.6g of KCl is (4.0g KCl/74.55g/mole KCl) = 0.0617 moles of KCl.
Write the definition of Molar and set the volume to X ( X will tell us how many liters are needed to make a 4M solution from 0.0617 moles of KCl)
4.0M = (0.0617 moles KCl)/X
(4.0 moles/liter)*X = 0.0617 moles KCl
X = (0.0617 moles KCl)/(4.0 moles KCl)
X = 0.0154 liters, or 15.4 ml
===
[(0.0154 liters)*(4.0 moles/liter) = 0.0617 moles KCl]
