Question

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

Answer 1

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



`(2.75( mol NaOH))/(1000(g/ water)) = (x (mol NaOH))/(350(g/water))`,

`x= (2.75*350)/(1000) = 0.963 (mol NaOH)`
`0.963 (mol NaOH)* (40.00 (g NaOH))/(1 ( mol NaOH)) =38.5 (g NaOH)`