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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 473 · 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.

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

Answer key

  1. needed
  2. needed
  3. lemon juice
  4. True
  5. soap water is a base
  6. a balloon
  7. it stays yellow
  8. False
  9. baking soda water
  10. stays yellow
  11. a mirror
  12. the light we look in
  13. True
  14. stays yellow
  15. reddish-brown
  16. yeast
  17. stays yellow
  18. a comb
  19. not needed
  20. True
  21. True
  22. not needed
  23. reddish-brown
  24. lemon juice
  25. a battery cell
  26. a base
  27. the liquid we test
  28. an acid
  29. the number of drops
  30. False
  31. True
  32. False
  33. plain water
  34. False
  35. True
  36. tamarind water
  37. a dropper or spoon
  38. lemon juice
  39. needed
  40. reddish

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