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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 542 · 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.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) it stays white (d) green
  2. 2.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  3. 3.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  4. 4.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  5. 5.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
  7. 7.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  8. 8.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  9. 9.⚖️ 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
  10. 10.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) baking soda water (d) soap solution
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) lemon juice (d) a mirror
  12. 12.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  13. 13.🫧 Which of these is a base? (a) soap solution (b) lemon juice (c) plain water (d) sugar water
  14. 14.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a balloon (c) a comb (d) a mirror
  15. 15.🔍 Which is the odd one out? (a) vinegar (b) tamarind water (c) sugar water (d) baking soda water
  16. 16.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  17. 17.⚖️ 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
  18. 18.🫧 Which of these is an acid? (a) plain water (b) vinegar (c) detergent water (d) baking soda water
  19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
  20. 20.True or false: tamarind water is neutral. (a) True (b) False
  21. 21.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
  22. 22.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  23. 23.True or false: soap solution is a base. (a) False (b) True
  24. 24.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  25. 25.🫧 Which of these is an acid? (a) soap solution (b) plain water (c) detergent water (d) tamarind water
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  27. 27.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  28. 28.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  29. 29.⚖️ 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
  30. 30.🫧 Which of these is a base? (a) baking soda water (b) lemon juice (c) tamarind water (d) salt water
  31. 31.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) curd (d) plain water
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  34. 34.True or false: a mirror is not needed for the turmeric test. (a) False (b) True
  35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  36. 36.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  37. 37.🔮 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
  38. 38.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a balloon (c) water (d) turmeric powder
  40. 40.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed

Answer key

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

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