Question

A solution hydrogen peroxide is 15.2%by mass what is the molarity of the solution assume that the solution has a density of 1.01gram per mililiter

Answer 1

15.2g H2O2 in 100g solution

Density of solution = 1.01g/ml

Volume of solution = mass/density = 100/1.01 = 99ml

Molarity = no. of moles of H202/Volume of solution in litres

= 0.45/0.099 = 4.55 mol/L

Answer 2

Answer:

The molarity of the solution of hydrogen peroxide will be equal to 4.51M.

Explanation:

We have given,

The mass percentage of hydrogen peroxide solution = 15.2%

It means that 15.2g of mass of H₂O₂ is present in 100g of solution.

Therefore, the mass of solution = 100g

Given, the density of the solution = 1.01g/ml

We know, density = mass/Volume

So, Volume of H₂O₂ solution = mass/ density

                                                $=\frac{100}{1.01} = 99ml=0.099L$

We know the molecular mass of H₂O₂ = 34 g/mol

The number of moles of H₂O₂ $=\frac{15.2}{34}=0.45$

Molarity of solution = moles of H₂O₂/ Volume of solution (L)

Molarity of the solution $=\frac{0.45}{0.099}= 4.51molL^{-1}$

Therefore, the molarity of hydrogen peroxide H₂O₂ solution is 4.51mol/L.