The bleach solution used in this procedure contains 5.25% by mass NaClO. Assuming the solution has a density of 1.0 g/mL, calculate the number of moles of NaClO in the bleach solution.

0.0705 moles NaClO

Explanation:

Assuming the bleach solution are 100mL:

First, we need to find the mass of the solution knowing density = 1.0g/mL:

100mL * (1g/mL) = 100g

Then, we must find the mass of NaClO in 100g of solution using its percentage by mass:

100g * (5.25g NaClO / 100g) = 5.25g NaClO

As the last point, we need to convert the mass to moles using molar mass of NaClO = 74.44g/mol:

5.25g NaClO * (1mol/74.44g) = 0.0705 moles NaClO

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