Question

How many milliliters of 10.5 M hydrobromic acid solution should be used to prepare 2.00 L of 0.800 M HBr ?

Answer 1

By the formula,

N₁ X V₁ = N₂ X V₂

_{we can also use Molarity(M) in place of Normality (N),}

M₁ X V₁ = M₂ X V₂

10.5 M X V₁ = 0.8 M X 2 Liters

V1 = 0.8 X 2 X 1000/ 10.5 mL

V₁= 152.38 mL of  10.5 M hydrobromic acid should be used.