Consider the following reaction of calcium hydride (CaH2) with molten sodium metal: CaH2(s) + 2 Na(l) -> 2 NaH(s) + Ca(l) Ide
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Answer:
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