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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 731 · 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.🫧 Which of these is an acid? (a) plain water (b) sugar water (c) orange juice (d) detergent water
  2. 2.True or false: orange juice is neutral. (a) False (b) True
  3. 3.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  4. 4.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
  5. 5.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) lemon juice (d) vinegar
  6. 6.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) a white party dress (d) your school uniform
  7. 7.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a balloon (d) white paper strips
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) white paper strips (d) turmeric powder
  9. 9.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  10. 10.🔍 Which is the odd one out? (a) baking soda water (b) salt water (c) tamarind water (d) plain water
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) water (d) a mirror
  12. 12.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  15. 15.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it turns green (d) it stays yellow
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) white paper strips (d) a battery cell
  17. 17.⚖️ 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
  18. 18.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  19. 19.True or false: plain water keeps turmeric yellow. (a) False (b) True
  20. 20.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  21. 21.🫧 Which of these is neutral? (a) tamarind water (b) plain water (c) curd (d) orange juice
  22. 22.🔍 Which is the odd one out? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
  23. 23.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) vinegar (c) tamarind water (d) baking soda water
  24. 24.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) green (d) white at once
  25. 25.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  26. 26.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) turmeric powder (d) a comb
  27. 27.🧺 Which of these is needed for the turmeric test? (a) water (b) a magnet (c) a mirror (d) a battery cell
  28. 28.🫧 Which of these is neutral? (a) curd (b) vinegar (c) lemon juice (d) sugar water
  29. 29.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  30. 30.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
  31. 31.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  32. 32.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  33. 33.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  34. 34.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) baking soda water (d) detergent water
  35. 35.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  36. 36.True or false: detergent water is a base. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) True (b) False
  38. 38.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) orange juice (d) plain water
  39. 39.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  40. 40.True or false: yeast is not needed for the turmeric test. (a) False (b) True

Answer key

  1. orange juice
  2. False
  3. a base
  4. soap water is a base
  5. soap solution
  6. an old shirt or apron
  7. a balloon
  8. a magnet
  9. True
  10. baking soda water
  11. a mirror
  12. turns reddish-brown
  13. False
  14. we keep it the same
  15. reddish-brown
  16. a battery cell
  17. the light we look in
  18. neutral
  19. True
  20. a base
  21. plain water
  22. lemon juice
  23. baking soda water
  24. reddish
  25. needed
  26. turmeric powder
  27. water
  28. sugar water
  29. True
  30. use only kitchen items
  31. neutral
  32. False
  33. False
  34. sugar water
  35. not needed
  36. True
  37. False
  38. baking soda water
  39. False
  40. True

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