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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 582 · 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: salt water turns turmeric reddish-brown. (a) False (b) True
  2. 2.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  4. 4.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  5. 5.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  6. 6.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) plain water (d) baking soda water
  7. 7.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  8. 8.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it turns blue (c) it disappears (d) it turns darker red
  9. 9.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  10. 10.⚖️ 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
  11. 11.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  12. 12.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  13. 13.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) soap solution (c) turmeric powder (d) a battery cell
  14. 14.True or false: lemon juice is a base. (a) True (b) False
  15. 15.True or false: baking soda water is a base. (a) True (b) False
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a magnet (c) soap solution (d) water
  17. 17.🫧 Is vinegar an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  19. 19.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the liquid we test (d) the number of drops
  21. 21.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) green (d) white at once
  22. 22.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  23. 23.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
  24. 24.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  25. 25.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  26. 26.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  27. 27.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  28. 28.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  29. 29.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) lemon juice (c) water (d) turmeric powder
  31. 31.True or false: sugar water is an acid. (a) False (b) True
  32. 32.True or false: yeast is needed for the turmeric test. (a) False (b) True
  33. 33.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) lemon juice (c) a magnet (d) a balloon
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  36. 36.True or false: sugar water is neutral. (a) True (b) False
  37. 37.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  38. 38.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  39. 39.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  40. 40.🫧 Which of these is a base? (a) vinegar (b) tamarind water (c) detergent water (d) orange juice

Answer key

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

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