# Chem 112

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1. What is molarity?
Moles of solute per Liter of solution.. M=mol/L
2. What is molality?
Moles of solute per Kg of solvent.. m=mol/kg
3. What is mole fraction?
Moles of component solving for per total # of moles
4. What is mole percent?
Mole fraction X 100
5. What is mass (or volume) fraction?
Mass of solute per total mass of solution
6. What is mass (weight) percent or percent by weight?
Mass fraction X 100
7. What is volume percent or percent by volume?
Volume fraction X 100
8. What us ppm (parts per million)?
Mass fraction X 10^6
9. What is ppb (parts per billion)?
Mass fraction X 10^9
10. What does temperature cause change in?
Volume
11. What concentration is temperature dependent?
Molarity
12. What do u assume is the solvent if it's not stated in the problem?
Water
13. If you are given weight% (mass percent), what sample size will be chosen?
100g of solution
14. If you are given Molarity, what do u assume?
1 Liter (1000 mL)
15. If you are given Molality, what do u assume?
1 Kg (1000g)
16. In problems that are given Molarity & Liters are assumed, the Molarity equals ________ of the solute.
The moles
17. To get from grams -> kg, what do u do?
Move the decimal 3 places to the left
18. To get from mL -> L, what do u do?
Move the decimal 3 places to the left
19. Density = ______/_______
Mass/Volume
 Author: tessaj21 ID: 36895 Card Set: Chem 112 Updated: 2010-09-23 19:36:21 Tags: Concentrations 1st chem test Folders: Description: Reflects how dense the solute is in a solvent Show Answers: