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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 137 · 40 questions
TalentJR

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

NameDateTime takenScore ___ / 40
  1. 1.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) yeast (d) soap solution
  2. 2.🫧 Which of these is a base? (a) detergent water (b) tamarind water (c) orange juice (d) plain water
  3. 3.True or false: curd is an acid. (a) False (b) True
  4. 4.🫧 Which of these is a base? (a) lemon juice (b) plain water (c) salt water (d) baking soda water
  5. 5.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  6. 6.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  7. 7.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  9. 9.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  10. 10.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) tamarind water (c) soap solution (d) detergent water
  11. 11.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) bright blue (d) green
  12. 12.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) a balloon (d) a dropper or spoon
  13. 13.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  15. 15.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  16. 16.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  17. 17.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  18. 18.🫧 Which of these is neutral? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
  19. 19.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
  22. 22.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  23. 23.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the turmeric paper (d) the light we look in
  25. 25.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  27. 27.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  28. 28.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) soap solution (d) white paper strips
  30. 30.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) a balloon (d) lemon juice
  31. 31.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  32. 32.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  33. 33.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  34. 34.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) salt water (c) tamarind water (d) lemon juice
  35. 35.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) soap solution (d) salt water
  36. 36.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) tamarind water (d) baking soda water
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the light we look in
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  40. 40.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True

Answer key

  1. yeast
  2. detergent water
  3. True
  4. baking soda water
  5. True
  6. an acid
  7. False
  8. True
  9. stays yellow
  10. tamarind water
  11. reddish-brown
  12. a balloon
  13. stays yellow
  14. we change it
  15. soap solution
  16. a base
  17. a base
  18. sugar water
  19. stays yellow
  20. stays yellow
  21. an old shirt or apron
  22. neutral
  23. lemon juice
  24. the colour we see
  25. an acid
  26. False
  27. an acid
  28. reddish
  29. a magnet
  30. lemon juice
  31. True
  32. True
  33. turns reddish-brown
  34. detergent water
  35. soap solution
  36. baking soda water
  37. False
  38. the light we look in
  39. we keep it the same
  40. True

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