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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 372 · 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) turmeric powder (b) white paper strips (c) a battery cell (d) lemon juice
  2. 2.🫧 Which of these is neutral? (a) sugar water (b) orange juice (c) soap solution (d) vinegar
  3. 3.🫧 Which of these is a base? (a) tamarind water (b) orange juice (c) baking soda water (d) vinegar
  4. 4.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  5. 5.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  6. 6.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  7. 7.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  8. 8.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the liquid we test (d) the number of drops
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  11. 11.⚖️ 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
  12. 12.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the number of drops (d) the turmeric paper
  14. 14.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  16. 16.🫧 Which of these is a base? (a) orange juice (b) lemon juice (c) vinegar (d) detergent water
  17. 17.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) reddish-brown (d) green
  18. 18.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  19. 19.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  20. 20.🧺 Which of these is not needed for the turmeric test? (a) water (b) a battery cell (c) turmeric powder (d) white paper strips
  21. 21.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
  23. 23.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) yeast (d) turmeric powder
  24. 24.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  25. 25.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  26. 26.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  28. 28.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is an acid (c) soap is hot (d) soap is magnetic
  29. 29.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  30. 30.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
  31. 31.True or false: lemon juice is neutral. (a) False (b) True
  32. 32.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) vinegar (d) baking soda water
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) water (b) turmeric powder (c) soap solution (d) a balloon
  34. 34.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) lemon juice (d) baking soda water
  35. 35.True or false: salt water is an acid. (a) True (b) False
  36. 36.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  37. 37.True or false: vinegar is a base. (a) False (b) True
  38. 38.True or false: lemon juice is an acid. (a) False (b) True
  39. 39.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
  40. 40.⚖️ 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 change it (c) we measure it

Answer key

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

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