Freezing Point Depression Molality

If you want to lower water’s freezing point 15 degrees celsius by adding NaCl, what must the molality of the salt solution be (Kf for water is 1.86 degrees celsius per molal)?

15 oC = (2 particles)(1.86 oC/m)(molal NaCl (aq))
molal NaCl(aq) = 4.03 molal

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: