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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 149 · 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.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) baking soda water (d) vinegar
  2. 2.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  3. 3.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  4. 4.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is magnetic (d) soap is hot
  5. 5.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  6. 6.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a magnet (d) soap solution
  8. 8.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns green (d) it turns blue
  9. 9.🛟 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
  10. 10.True or false: water is not needed for the turmeric test. (a) False (b) True
  11. 11.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the number of drops (d) the liquid we test
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
  14. 14.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the light we look in (d) the colour we see
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) turmeric powder (d) a mirror
  17. 17.True or false: sugar water is neutral. (a) True (b) False
  18. 18.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) sugar water
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  20. 20.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) detergent water (d) baking soda water
  21. 21.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  22. 22.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  24. 24.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.🫧 Which of these is a base? (a) plain water (b) sugar water (c) lemon juice (d) soap solution
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a dropper or spoon (d) a balloon
  27. 27.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  28. 28.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  29. 29.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  30. 30.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  31. 31.🫧 Which of these is neutral? (a) soap solution (b) lemon juice (c) salt water (d) detergent water
  32. 32.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) water (c) white paper strips (d) soap solution
  34. 34.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) baking soda water (c) salt water (d) sugar water
  35. 35.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  36. 36.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) white paper strips (c) a balloon (d) water
  37. 37.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
  38. 38.True or false: curd is a base. (a) False (b) True
  39. 39.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  40. 40.True or false: baking soda water is an acid. (a) False (b) True

Answer key

  1. vinegar
  2. False
  3. False
  4. soap water is a base
  5. a base
  6. an acid
  7. a magnet
  8. reddish-brown
  9. an old shirt or apron
  10. False
  11. False
  12. the liquid we test
  13. we keep it the same
  14. plain water
  15. the colour we see
  16. a mirror
  17. True
  18. sugar water
  19. True
  20. salt water
  21. not needed
  22. an acid
  23. we change it
  24. stays yellow
  25. soap solution
  26. a balloon
  27. True
  28. False
  29. False
  30. needed
  31. salt water
  32. not needed
  33. yeast
  34. baking soda water
  35. False
  36. a balloon
  37. lemon juice
  38. False
  39. turns reddish-brown
  40. False

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