Question

A solution is formed by mixing 0.400 mol NaOH

into 0.800 kg water. What is the best set up to find
molality?
m = mol solute kg solution
m= mol solute kg soivent
m= mol solvent/kg solute

Answer 1

First Question:

B. m = mol solute/kg solvent

Second Question:

0.500

Third Question:

0.271

Fourth Question:

0.226

Explanation:

Go it right.

Answer 2

The correct answer is m= mol solute kg soivent

Step-by-step explanation:

Molality is a measure of concentration, which indicates the moles of solute (in this case sodium hydroxide) in 1kg of solvent .

In this case:

0,800 kg water-----0,400 mol NaOH

1 ,000 kg water ---x=(1 ,000 kg water x 0,400 mol NaOH)/0,800 kg water

x=0,5 mol NaOH---> The solution is 0,5 molal (0,5 m)