Answer:
Explanation:
To solve this problem, we need to obtain the number of moles of the solute we desired to prepare;
Number of moles = molarity x volume
Parameters given;
volume of solution = 500mL = 0.5L
molarity of solution = 0.5M
Number of moles = 0.5 x 0.5 = 0.25moles
Now to know the volume stock to take;
Volume of stock = [tex]\frac{number of moles }{molarity}[/tex]
molarity of stock = 4M
volume = [tex]\frac{0.25}{4}[/tex] = 0.0625L or 62.5mL
