Question

How many grams of NaOH will make 1M of its aqueous solution in 1000cm3

Answer 1

Answer: The mass of NaOH is 40 g

Step-by-step explanation:

Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:

`\text{Molarity of solution}=\frac{\text{Given mass of solute}* 1000}{\text{Molar mass of solute}* \text{Volume of solution (mL)}}` .....(1)

Given values:

Molarity of NaOH = 1 M

Molar mass of NaOH = 40 g/mol

Volume of the solution =
`1000cm^3=1000 mL` (Conversion factor:
`1cm^3=1mL`)

Putting values in equation 1, we get:

`1=\frac{\text{Mass of NaOH}* 1000}{40* 1000}\\\\\text{Mass of NaOH}=(1* 40* 1000)/(1000)=40g`

Hence, the mass of NaOH is 40 g