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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 578 · 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 turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) tamarind water (d) baking soda water
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) lemon juice (d) detergent water
  3. 3.🧺 Which of these is needed for the turmeric test? (a) yeast (b) turmeric powder (c) a battery cell (d) a comb
  4. 4.True or false: curd is neutral. (a) False (b) True
  5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
  6. 6.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  7. 7.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  8. 8.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it stays yellow (d) it turns green
  9. 9.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) detergent water (d) soap solution
  10. 10.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) plain water (d) detergent water
  11. 11.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  13. 13.True or false: detergent water is an acid. (a) True (b) False
  14. 14.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) water (c) a dropper or spoon (d) yeast
  15. 15.True or false: vinegar is an acid. (a) False (b) True
  16. 16.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) soap solution (d) a balloon
  17. 17.⚖️ 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
  18. 18.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it disappears (d) it turns darker red
  19. 19.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  20. 20.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) water (c) a comb (d) yeast
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) lemon juice (d) a magnet
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
  23. 23.⚖️ 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
  24. 24.True or false: soap solution is an acid. (a) False (b) True
  25. 25.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  26. 26.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the number of drops (d) the light we look in
  28. 28.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  29. 29.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.🫧 Which of these is neutral? (a) curd (b) sugar water (c) detergent water (d) lemon juice
  31. 31.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) tamarind water (d) soap solution
  32. 32.True or false: plain water is an acid. (a) True (b) False
  33. 33.True or false: salt water is an acid. (a) True (b) False
  34. 34.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) bright blue (c) it stays white (d) reddish-brown
  35. 35.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) turmeric powder (d) a balloon
  37. 37.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  38. 38.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
  40. 40.True or false: plain water turns turmeric reddish-brown. (a) True (b) False

Answer key

  1. baking soda water
  2. detergent water
  3. turmeric powder
  4. False
  5. reddish
  6. needed
  7. neutral
  8. reddish-brown
  9. vinegar
  10. plain water
  11. stays yellow
  12. False
  13. False
  14. yeast
  15. True
  16. soap solution
  17. we keep it the same
  18. it turns yellow again
  19. False
  20. water
  21. a magnet
  22. the turmeric paper
  23. False
  24. False
  25. stays yellow
  26. needed
  27. the colour we see
  28. stays yellow
  29. stays yellow
  30. sugar water
  31. tamarind water
  32. False
  33. False
  34. reddish-brown
  35. needed
  36. a balloon
  37. an acid
  38. True
  39. the number of drops
  40. False

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