Quiz 2

Question 1

What are suspensions?

Answer 1

• Non-homologous mixtures of 2+ substances
• Eventually separate into their components
• Ex., oil and water

Question 2

What are solutions?

Answer 2

• Homologous mixtures of 2+ substances
• Remains stable indefinitely
• Solvent in excess

Question 3

Describe percent concentration

Answer 3

• Amount of solute in a total volume of 100 mL of solution (solute/solution)
  
  • Solid = grams, liquid = mL
  • X parts per x = x amount per x mL

Question 4

What are dilutions?

State the dilution factor

Answer 4

• Making more concentrated solutions less concentrated by adding more solvent
  
  • Dilution factor: final volume/original volume
  • Ex., dilution factor of 10 = 10% –> 1% (10 fold, final volume is 10x original)

Question 5

What are serial dilutions?

Answer 5

• A serial dilution is the stepwise dilution of a substance in solution. Usually the dilution factor at each step is constant.