Please help me with Freezing Point one last time? I am still having trouble and I only have one last try to get it correct? Where am I going wrong?
Please solve in steps and show all work.
A solution of sodium bromide (NaBr) is prepared by dissolving 6.24 g of the salt in 1.00 kg water (H2O). What is the freezing point of this solution? (The freezing point of pure water is 0°C (exactly) at 1 atm pressure; Kf= 1.86°C/m.
I have worked on this problem for 45 mins now. 0.2256 is incorrect ... Please Help!
Please solve in steps and show all work.
A solution of sodium bromide (NaBr) is prepared by dissolving 6.24 g of the salt in 1.00 kg water (H2O). What is the freezing point of this solution? (The freezing point of pure water is 0°C (exactly) at 1 atm pressure; Kf= 1.86°C/m.
I have worked on this problem for 45 mins now. 0.2256 is incorrect ... Please Help!
1 Answer
Have you accounted for the speciation...?
Explanation:
By which I mean the reaction of sodium bromide with water....
TWO MOLES of particles result from the one mole of salt.
And so WITH RESPECT to the particles in solution we have a molality of
And thus .................
And so the freezing point of the solution is approx.
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