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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 292 · 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 keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  4. 4.⚖️ 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
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a battery cell (d) turmeric powder
  6. 6.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) sugar water
  7. 7.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
  8. 8.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) vinegar (d) lemon juice
  9. 9.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  10. 10.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  11. 11.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.True or false: water is needed for the turmeric test. (a) False (b) True
  14. 14.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
  16. 16.True or false: lemon juice is an acid. (a) False (b) True
  17. 17.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  18. 18.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) water (c) a dropper or spoon (d) turmeric powder
  20. 20.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
  21. 21.🧺 Which of these is needed for the turmeric test? (a) water (b) a magnet (c) a comb (d) a balloon
  22. 22.🫧 Which of these is a base? (a) sugar water (b) detergent water (c) salt water (d) tamarind water
  23. 23.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  24. 24.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) bright blue (c) it stays white (d) reddish-brown
  25. 25.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  26. 26.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  28. 28.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) yeast (c) a dropper or spoon (d) turmeric powder
  30. 30.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  31. 31.🫧 Which of these is neutral? (a) orange juice (b) detergent water (c) curd (d) salt water
  32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is magnetic (d) soap is an acid
  33. 33.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) vinegar (d) detergent water
  34. 34.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) a comb (d) white paper strips
  36. 36.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) tamarind water (c) soap solution (d) vinegar
  37. 37.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  38. 38.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) yeast (c) white paper strips (d) a comb
  39. 39.True or false: plain water is neutral. (a) True (b) False
  40. 40.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) plain water (d) baking soda water

Answer key

  1. lemon juice
  2. reddish-brown
  3. use only kitchen items
  4. we change it
  5. a battery cell
  6. sugar water
  7. lemon juice
  8. soap solution
  9. False
  10. turns reddish-brown
  11. stays yellow
  12. stays yellow
  13. True
  14. True
  15. False
  16. True
  17. True
  18. an acid
  19. a balloon
  20. it stays yellow
  21. water
  22. detergent water
  23. stays yellow
  24. reddish-brown
  25. True
  26. False
  27. we keep it the same
  28. False
  29. yeast
  30. True
  31. salt water
  32. soap water is a base
  33. detergent water
  34. needed
  35. a comb
  36. soap solution
  37. it stays yellow
  38. white paper strips
  39. True
  40. plain water

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