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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 183 · 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.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  2. 2.True or false: salt water is a base. (a) False (b) True
  3. 3.True or false: yeast is needed for the turmeric test. (a) True (b) False
  4. 4.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  5. 5.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  6. 6.🫧 Which of these is an acid? (a) salt water (b) plain water (c) baking soda water (d) orange juice
  7. 7.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) tamarind water (d) soap solution
  8. 8.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a magnet (d) lemon juice
  10. 10.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  11. 11.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  12. 12.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) reddish (d) white at once
  13. 13.True or false: orange juice is a base. (a) True (b) False
  14. 14.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  15. 15.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) an old shirt or apron (d) a white party dress
  16. 16.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) a battery cell (d) soap solution
  18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is an acid (c) soap water is a base (d) soap is hot
  19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
  20. 20.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  21. 21.True or false: vinegar is neutral. (a) True (b) False
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) yeast (d) soap solution
  24. 24.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  25. 25.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) vinegar (d) sugar water
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  27. 27.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the liquid we test (c) the colour we see (d) the number of drops
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a balloon (c) turmeric powder (d) soap solution
  30. 30.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  31. 31.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) sugar water (d) detergent water
  32. 32.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) plain water
  33. 33.🫧 Which of these is an acid? (a) salt water (b) baking soda water (c) tamarind water (d) detergent water
  34. 34.🫧 Which of these is a base? (a) plain water (b) lemon juice (c) soap solution (d) tamarind water
  35. 35.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  36. 36.⚖️ 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
  37. 37.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  40. 40.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False

Answer key

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

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