Ou will prepare 250-ml of this solution using a 30% (m/v) naoh stock solution. how many ml of the naoh stock solution will you need to prepare the 0.1m solution?

Explanation:

You must convert 30 % (m/v) to a molar concentration.

Assume 1 L of solution.

1. Mass of NaOH

2. Moles of NaOH  

3. Molar concentration of NaOH

4. Volume of NaOH

Now that you know the concentration, you can use the dilution formula .

to calculate the volume of stock solution.

Data:

c₁ = 7.50 mol·L⁻¹; V₁ = ?

c₂ = 0.1   mol·L⁻¹; V₂ = 250 mL

Calculations:

(a) Convert millilitres to litres

(b) Calculate the volume  of dilute solution