A 50.0 mL Volumetric flask filled with aqueous solution of hydrogen peroxide has a total mass of 88.5 g. The mass of the volumetric flask is 16.5 g. What is the density of the aqueous solution of hydrogen peroxide ?

1.44 g/mL

Explanation:

From the question given above, the following data were obtained:

Volume (V) of H2O2 = 50 mL.

Mass of flask + H2O2 = 88.5 g.

Mass of flask = 16.5 g.

Density (D) =?

Next, we shall determine the mass of the hydrogen peroxide (H2O2).

This can be obtained as follow:

Mass of flask + H2O2 = 88.5 g.

Mass of flask = 16.5 g.

Mass of H2O2 =?

Mass of H2O2 = (Mass of flask + H2O2) – (Mass of flask)

Mass of H2O2 = 88.5 – 16.5

Mass of H2O2 = 72 g

Finally, we shall determine the density of the hydrogen peroxide (H2O2) as follow:

Volume (V) of H2O2 = 50 mL.

Mass (m) of H2O2 = 72 g.

Density (D) =?

Density (D) = mass (m) /volume (V)

D = m/V

D = 72 g / 50 mL

D = 1.44 g/mL

Therefore, the density of the hydrogen peroxide (H2O2) is 1.44 g/mL.

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