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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 107 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the liquid we test (d) the colour we see
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  3. 3.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) yeast (c) a dropper or spoon (d) turmeric powder
  5. 5.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) tamarind water (d) vinegar
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  7. 7.⚖️ 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
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) water (c) a dropper or spoon (d) lemon juice
  9. 9.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) tamarind water (d) soap solution
  10. 10.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
  11. 11.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  12. 12.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) reddish (d) green
  14. 14.🫧 Which of these is neutral? (a) vinegar (b) orange juice (c) sugar water (d) detergent water
  15. 15.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
  16. 16.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  17. 17.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  18. 18.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  19. 19.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  20. 20.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
  21. 21.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  22. 22.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) tamarind water (c) sugar water (d) lemon juice
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) a dropper or spoon (d) a battery cell
  24. 24.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  25. 25.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  26. 26.🫧 Which of these is an acid? (a) plain water (b) baking soda water (c) orange juice (d) soap solution
  27. 27.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  28. 28.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) tamarind water
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a battery cell (c) a mirror (d) lemon juice
  30. 30.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  31. 31.True or false: plain water keeps turmeric yellow. (a) False (b) True
  32. 32.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  33. 33.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  34. 34.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  35. 35.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  36. 36.🫧 Which of these is a base? (a) baking soda water (b) curd (c) tamarind water (d) vinegar
  37. 37.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap water is a base (d) soap is magnetic
  38. 38.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  39. 39.True or false: tamarind water is an acid. (a) False (b) True
  40. 40.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform

Answer key

  1. the liquid we test
  2. True
  3. stays yellow
  4. yeast
  5. detergent water
  6. we measure it
  7. the number of drops
  8. yeast
  9. soap solution
  10. reddish-brown
  11. True
  12. not needed
  13. reddish
  14. sugar water
  15. it turns yellow again
  16. False
  17. turns reddish-brown
  18. stays yellow
  19. not needed
  20. sugar water
  21. a base
  22. soap solution
  23. a battery cell
  24. True
  25. False
  26. orange juice
  27. neutral
  28. tamarind water
  29. lemon juice
  30. it stays yellow
  31. True
  32. not needed
  33. neutral
  34. a base
  35. True
  36. baking soda water
  37. soap water is a base
  38. not needed
  39. True
  40. an old shirt or apron

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