Question

Calculate the concentration of HBr solution in mol/L in a sample which has density 1.50g/mL and mass percentage of HBr in it being 48%. (Molar mass of HBr = 80.91 g/mol)​

Answer 1

Calculate the concentration of HBr solution in mol/L in a sample which has density 1.50g/mL and mass percentage of HBr in it being 48%. (Molar mass of HBr = 80.91 g/mol)

Answer 2

The concentration of HBr solution is 8.08 mol/L

Explanation:

Molarity is defined as the number of moles of solute present in one liter of solution.

Formula used :

$Molarity=\frac{n\times 1000}{V_s}$

n= moles of solute

Given: 48 g of HBr in 100 g of solution

$Moles=\frac{\text{Given mass}}{\text{Molar mass}}=\frac{48g}{80.91g/mol}=0.5932moles$

Volume of solution =$\frac{\text {mass of solution}}{\text {density of solution}}=\frac{100g}{1.50g/ml}=66.7ml$

$Molarity=\frac{0.5392\times 1000}{66.7}=8.08mol/L$

The concentration of HBr solution in mol/L is 8.08

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