Asked by Anonymous
Calculate the molality of a 2.50 molarity NaCl solution. Density of solution = 1.08 g/ml.
Answers
Answered by
DrBob222
Density = 1.08 g/mL.
1000 mL has a mass of
1000 mL x 1.08 mL = 1080 grams.
2.50 moles NaCl has what mass?
2.50 x 58.5 (you need to be more accurate--this is just a quick guess) = 146 grams.
What is the mass of the water?
1080 mass water + 2.50 moles NaCl.
-146 g NaCl
difference is 934 g H2O.
So molality = 2.50 mols/0.934 kg solvnt = 2.68 m.
Check my thinking.Check my arithmetic.
1000 mL has a mass of
1000 mL x 1.08 mL = 1080 grams.
2.50 moles NaCl has what mass?
2.50 x 58.5 (you need to be more accurate--this is just a quick guess) = 146 grams.
What is the mass of the water?
1080 mass water + 2.50 moles NaCl.
-146 g NaCl
difference is 934 g H2O.
So molality = 2.50 mols/0.934 kg solvnt = 2.68 m.
Check my thinking.Check my arithmetic.
Answered by
Mark
I believe the density of water is 1 g/ml
There are no AI answers yet. The ability to request AI answers is coming soon!
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.