Test Your Numeracy ...

Notes:

Hint 1

Hint 1:
Step 1: work out the quantity of substance required (volume x concentration)
Step 2: work out what volume of stock solution contains this quantity
Step 3:The volume of distilled water needed is the volume of the final solution minus the volume calculated in Step 2.

Hint 2

Hint 2:
Equation Method (logic is safer!)
S=Conc of stock (M) V=Vol of final solution (Litres) C=Conc of final soln. (M) Vs=vol of stock needed (Litres) Vw=vol of water needed Vs=VC/S; Vw=V-V