Required Resources
Read/review the following resources for this activity:
- Textbook: Chapter 5, 6, 11
- Unit 3 lesson
Initial Post Instructions
For your initial post pick a combination of one of the following molecules, one mass quantity, and one total solution volume from this table. You may not use the same combination as another student so be sure to read any existing peers postings before posting your own.
| Molecule | Mass | Volume |
| NaCl | 2 g | 150 ml |
| CaBr2 | 6 g | 3 L |
| Li3N | 1 g | 500 ml |
| CaO | 7 g | 14 L |
For example, one possible combination would be 2 grams of NaCl in 500 ml of solution. Then, give each of the following for your unique combination being sure to show all of your work:
- %mass/volume concentration
- Molarity
- Osmolarity
ANSWER:
I choose 6g of Li3N in 150 ml
1) %mass/volume concentration:
6g/150ml=.04 g/ml
.04 g/ml x 100 = 4 g/ml
%= 4 g/ml
continue reading …