PORTAGE LEARNING BIOL 331 /
BIOL331 MODULE 1 ACTUAL EXAM
QUESTIONS AND CORRECT
ANSWERS LATEST UPDATE 2026/2027.
, 1. C1V1=C2V2✔✔ CORRECT ANSWER C1 = concentration of substance before dilution
V1 = volume of a solution before dilution
C2 = concentration of a substance after dilution V2 = volume of a
solution after dilution
2. Definition of solution✔✔ CORRECT ANSWER A solute dissolved in a solvent
3. concept of concentration✔✔ CORRECT ANSWER The amount of solute in an amount of water.
- More concentrated solutions have a higher amount of solute.
4. definition of Molarity✔✔ CORRECT ANSWER the number of moles of some substances in a liter of solution
5. Dilution factor✔✔ CORRECT ANSWER total volume/solute volume
6. spectrophotometer definition✔✔ CORRECT ANSWER standard and inexpensive technique to measure light absorption or the amount of
chemicals in a solution.
7. How a spectrophotometer works✔✔ CORRECT ANSWER uses a light beam which passes through the sample, and each compound in the
solution absorbs or transmits light over a certain wavelength.
8. Lambert's Law✔✔ CORRECT ANSWER - States that the absorbance of a material is directly proportional to its thickness or size
- This is the molar attenuation coeflcient
9. Beer's Law✔✔ CORRECT ANSWER - States that the absorbance of a material is directly proportional to its concentration
10. A = εc✔✔ CORRECT ANSWER - A = absorbance
- ε = molar attenuation coeflcient (how much a given substance inhibits light transmission at a particular wavelength)
- c = concentration
11. standard curve✔✔ CORRECT ANSWER Standard curves plot absorbance (y-axis) and concentration (x-axis)
12. How is a standard curve useful✔✔ CORRECT ANSWER These are useful tools because you can take a few measurements to get a line and then
can make reliable predictions about the concentration at other absorbance readings
13. Sample warning label 1✔✔ CORRECT ANSWER Flammability
14. Sample warning label 2✔✔ CORRECT ANSWER Reactivity
15. Sample warning label W✔✔ CORRECT ANSWER Special notice
16. Sample warning label O✔✔ CORRECT ANSWER Health
BIOL331 MODULE 1 ACTUAL EXAM
QUESTIONS AND CORRECT
ANSWERS LATEST UPDATE 2026/2027.
, 1. C1V1=C2V2✔✔ CORRECT ANSWER C1 = concentration of substance before dilution
V1 = volume of a solution before dilution
C2 = concentration of a substance after dilution V2 = volume of a
solution after dilution
2. Definition of solution✔✔ CORRECT ANSWER A solute dissolved in a solvent
3. concept of concentration✔✔ CORRECT ANSWER The amount of solute in an amount of water.
- More concentrated solutions have a higher amount of solute.
4. definition of Molarity✔✔ CORRECT ANSWER the number of moles of some substances in a liter of solution
5. Dilution factor✔✔ CORRECT ANSWER total volume/solute volume
6. spectrophotometer definition✔✔ CORRECT ANSWER standard and inexpensive technique to measure light absorption or the amount of
chemicals in a solution.
7. How a spectrophotometer works✔✔ CORRECT ANSWER uses a light beam which passes through the sample, and each compound in the
solution absorbs or transmits light over a certain wavelength.
8. Lambert's Law✔✔ CORRECT ANSWER - States that the absorbance of a material is directly proportional to its thickness or size
- This is the molar attenuation coeflcient
9. Beer's Law✔✔ CORRECT ANSWER - States that the absorbance of a material is directly proportional to its concentration
10. A = εc✔✔ CORRECT ANSWER - A = absorbance
- ε = molar attenuation coeflcient (how much a given substance inhibits light transmission at a particular wavelength)
- c = concentration
11. standard curve✔✔ CORRECT ANSWER Standard curves plot absorbance (y-axis) and concentration (x-axis)
12. How is a standard curve useful✔✔ CORRECT ANSWER These are useful tools because you can take a few measurements to get a line and then
can make reliable predictions about the concentration at other absorbance readings
13. Sample warning label 1✔✔ CORRECT ANSWER Flammability
14. Sample warning label 2✔✔ CORRECT ANSWER Reactivity
15. Sample warning label W✔✔ CORRECT ANSWER Special notice
16. Sample warning label O✔✔ CORRECT ANSWER Health
