Question

1826.5g of methanol (CH3OH), molar mass = 32.0 g/mol is added to 735 g of water, what is the molality of the methane 0.0348 m 1.13m 2.03 m 3.61 m 36.1 m Navigator F10 Delete Backspace

Answer 1

Molality = 1.13 m

Step-by-step explanation:

Molality is defined as the moles of the solute present in 1 kilogram of the solvent.

Given that:

Mass of
`CH_3OH` = 26.5 g

Molar mass of
`CH_3OH` = 32.04 g/mol

The formula for the calculation of moles is shown below:

`moles = (Mass\ taken)/(Molar\ mass)`

Thus,

`Moles= (26.5\ g)/(32.04\ g/mol)`

`Moles\ of\ CH_3OH= 0.8271\ moles`

Mass of water = 735 g = 0.735 kg ( 1 g = 0.001 kg )

So, molality is:

`m=\frac {0.8271\ moles}{0.735\ kg}`

Molality = 1.13 m