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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 871 · 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) lemon juice (b) detergent water (c) sugar water (d) soap solution
  2. 2.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  3. 3.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) yeast (d) a balloon
  4. 4.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  5. 5.⚖️ 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
  6. 6.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  7. 7.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  8. 8.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) water (d) soap solution
  10. 10.🔍 Which is the odd one out? (a) sugar water (b) vinegar (c) salt water (d) baking soda water
  11. 11.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap is hot (d) soap water is a base
  12. 12.True or false: baking soda water is a base. (a) True (b) False
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) lemon juice (d) yeast
  14. 14.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) plain water (d) salt water
  15. 15.⚖️ 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
  16. 16.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  17. 17.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid
  19. 19.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  20. 20.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  21. 21.True or false: tamarind water is neutral. (a) True (b) False
  22. 22.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
  23. 23.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
  24. 24.True or false: sugar water keeps turmeric yellow. (a) False (b) True
  25. 25.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  27. 27.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  28. 28.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) lemon juice (d) detergent water
  29. 29.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  30. 30.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it disappears (c) it turns blue (d) it turns yellow again
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) yeast (c) white paper strips (d) water
  32. 32.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) turmeric powder (c) yeast (d) white paper strips
  33. 33.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns black (c) it turns blue (d) it turns red
  34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) turmeric powder (d) a comb
  35. 35.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
  37. 37.🫧 Which of these is an acid? (a) orange juice (b) plain water (c) salt water (d) detergent water
  38. 38.True or false: plain water keeps turmeric yellow. (a) False (b) True
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a balloon (d) a dropper or spoon
  40. 40.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) water (d) a battery cell

Answer key

  1. lemon juice
  2. needed
  3. a dropper or spoon
  4. not needed
  5. False
  6. True
  7. False
  8. lemon juice
  9. a mirror
  10. baking soda water
  11. soap water is a base
  12. True
  13. lemon juice
  14. soap solution
  15. we change it
  16. turns reddish-brown
  17. turns reddish-brown
  18. use only kitchen items
  19. an acid
  20. False
  21. False
  22. reddish
  23. plain water
  24. True
  25. an acid
  26. True
  27. True
  28. detergent water
  29. an acid
  30. it turns yellow again
  31. yeast
  32. yeast
  33. it stays yellow
  34. a comb
  35. not needed
  36. we measure it
  37. orange juice
  38. True
  39. a balloon
  40. a battery cell

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