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9th grade materials and their properties

9th grade (Year 10 in England) · 16 questions · Common Core: NGSS.HS-PS1-3, NGSS.SEP 5 · England: GCSE Combined Science: Chemical analysis (required practical: chromatography)

Name

Date

Score/ 16

  1. Question 1

    A dye has an Rf value of 0.6 in water. If the solvent front moves 8 cm, how far will the dye move, in cm?

    Answercm

  2. Question 2

    Reference Rf values in the same solvent: dye A 0.15, dye B 0.35, dye C 0.55, dye D 0.8. An unknown ink gives one spot that moves 3 cm when the solvent moves 20 cm. Which dye is it?

    • A. dye A
    • B. dye D
    • C. dye B
    • D. dye C

  3. Question 3

    On a chromatogram the solvent front moved 10 cm from the start line and a spot moved 1.5 cm. What is the Rf value of the spot? Give 2 decimal places.

    Answer

  4. Question 4

    A dye has an Rf value of 0.3 in water. If the solvent front moves 10 cm, how far will the dye move, in cm?

    Answercm

  5. Question 5

    Reference Rf values in the same solvent: dye A 0.15, dye B 0.35, dye C 0.55, dye D 0.8. An unknown ink gives one spot that moves 7 cm when the solvent moves 20 cm. Which dye is it?

    • A. dye A
    • B. dye C
    • C. dye D
    • D. dye B

  6. Question 6

    On a chromatogram the solvent front moved 10 cm from the start line and a spot moved 0.5 cm. What is the Rf value of the spot? Give 2 decimal places.

    Answer

  7. Question 7

    A dye has an Rf value of 0.2 in water. If the solvent front moves 6 cm, how far will the dye move, in cm?

    Answercm

  8. Question 8

    Reference Rf values in the same solvent: dye A 0.15, dye B 0.35, dye C 0.55, dye D 0.8. An unknown ink gives one spot that moves 0.75 cm when the solvent moves 5 cm. Which dye is it?

    • A. dye C
    • B. dye B
    • C. dye D
    • D. dye A

  9. Question 9

    On a chromatogram the solvent front moved 5 cm from the start line and a spot moved 3 cm. What is the Rf value of the spot? Give 2 decimal places.

    Answer

  10. Question 10

    A dye has an Rf value of 0.2 in water. If the solvent front moves 10 cm, how far will the dye move, in cm?

    Answercm

  11. Question 11

    Reference Rf values in the same solvent: dye A 0.15, dye B 0.35, dye C 0.55, dye D 0.8. An unknown ink gives one spot that moves 3.5 cm when the solvent moves 10 cm. Which dye is it?

    • A. dye D
    • B. dye A
    • C. dye C
    • D. dye B

  12. Question 12

    On a chromatogram the solvent front moved 6 cm from the start line and a spot moved 4.4 cm. What is the Rf value of the spot? Give 2 decimal places.

    Answer

  13. Question 13

    A dye has an Rf value of 0.8 in water. If the solvent front moves 12 cm, how far will the dye move, in cm?

    Answercm

  14. Question 14

    Reference Rf values in the same solvent: dye A 0.15, dye B 0.35, dye C 0.55, dye D 0.8. An unknown ink gives one spot that moves 1.5 cm when the solvent moves 10 cm. Which dye is it?

    • A. dye A
    • B. dye C
    • C. dye B
    • D. dye D

  15. Question 15

    On a chromatogram the solvent front moved 10 cm from the start line and a spot moved 2.1 cm. What is the Rf value of the spot? Give 2 decimal places.

    Answer

  16. Question 16

    A dye has an Rf value of 0.3 in water. If the solvent front moves 12 cm, how far will the dye move, in cm?

    Answercm

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Answer key: 9th grade materials and their properties

  1. 1. 4.8 cm

  2. 2. A. dye A

  3. 3. 0.15

  4. 4. 3 cm

  5. 5. D. dye B

  6. 6. 0.05

  7. 7. 1.2 cm

  8. 8. D. dye A

  9. 9. 0.6

  10. 10. 2 cm

  11. 11. D. dye B

  12. 12. 0.73

  13. 13. 9.6 cm

  14. 14. A. dye A

  15. 15. 0.21

  16. 16. 3.6 cm