Zach needs to make a 2.75 m solution of NaOH(molar mass=40.00g/mol) using 350. g of water. What mass of NaOH should he dissolve

Question

Lunna [17]

3 years ago

15

Zach needs to make a 2.75 m solution of NaOH(molar mass=40.00g/mol) using 350. g of water. What mass of NaOH should he dissolve

in the water to make this solution? Please show the steps

Chemistry

1 answer:

goldfiish [28.3K] · Answer 1 · 2022-03-10T17:59:25+03:00

goldfiish [28.3K]3 years ago

3 0

Molality = number of mol solute/ 1000 g solvent = (2.75 mol NaOH)/1000g water

$\frac{2.75( mol NaOH)}{1000(g/ water)} = \frac{x (mol NaOH)}{350(g/water)} 


$ ,
$x= \frac{2.75*350}{1000} = 0.963 (mol NaOH)

$ $0.963 (mol NaOH)* \frac{40.00 (g NaOH)}{1 ( mol NaOH)} =38.5 (g NaOH)$