## adeniyta Group Title Could someone please help me with this question: Ascorbic acid (vitamin C) in waterC6H8O6, 176.1 g/mol molarity = 1.92 M d = 1.22 g/mLmolality = ? 2 years ago 2 years ago

1. Rogue Group Title

Do you know what the answer is? I don't think its right, but I got 3.61 messing around... I can't seem to get my units to cancel.

2. adeniyta Group Title

For the absorbic acid problem the answer is 2.18.

3. Rogue Group Title

Alright, I'm over complicating it, hold on, give me a few minutes, I'll get the answer.

4. Rogue Group Title

Yes! I got 2.17, but thats close enough. Let me post the work.

5. Rogue Group Title

Ascorbic Acid: C6H8O2 Molar mass: 176.1 g/mol Molarity: 1.92 M = 1.92 mol/L Density: 1.22 g/mL = 1220 g/L From the density, 1 liter of this solution would weigh 1220 g. There would be 1.92 moles of ascorbic acid in 1 liter of this solution. 1.92 mol/L * 176.1 g/mol = 338.112 g/L C6H8O2 1220 g solution - 338.112 g C6H8O2 = 881.888 g H2O (solvent) = 0.881888 kg H2O Molality = moles solute / kg solvent $m = \frac {1.92 mol C_6H_8O_2}{0.881888 kg H_2 O} \approx 2.17 mol/kg$

6. Rogue Group Title

Does that make sense?

7. adeniyta Group Title

Yes- this makes sense now- thank you a ton, I have an exam on this topic tomorrow morning!

8. Rogue Group Title

Alright, I wish you the best of luck! Ace that exam! :D

9. adeniyta Group Title

Thank you- will do! :)