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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 272 · 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 what we measure? (a) the light we look in (b) the colour we see (c) the liquid we test (d) the turmeric paper
  2. 2.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  3. 3.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  4. 4.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a battery cell (c) water (d) soap solution
  6. 6.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  7. 7.🔮 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
  8. 8.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  9. 9.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the colour we see (c) the liquid we test
  11. 11.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) detergent water (d) soap solution
  12. 12.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the turmeric paper (c) the liquid we test
  14. 14.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) vinegar (d) tamarind water
  15. 15.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  17. 17.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  18. 18.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) turmeric powder (c) water (d) lemon juice
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  22. 22.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap water is a base (d) soap is an acid
  23. 23.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  25. 25.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  26. 26.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  27. 27.🍋 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
  28. 28.True or false: curd is an acid. (a) True (b) False
  29. 29.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
  30. 30.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  31. 31.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  32. 32.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) water (b) a battery cell (c) soap solution (d) lemon juice
  35. 35.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a comb (c) a balloon (d) a dropper or spoon
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) turmeric powder (d) a mirror
  37. 37.True or false: plain water is a base. (a) True (b) False
  38. 38.True or false: salt 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) turmeric powder (b) a balloon (c) a dropper or spoon (d) water
  40. 40.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid

Answer key

  1. the colour we see
  2. not needed
  3. a base
  4. stays yellow
  5. a battery cell
  6. turns reddish-brown
  7. it stays yellow
  8. needed
  9. not needed
  10. the number of drops
  11. salt water
  12. an acid
  13. the turmeric paper
  14. detergent water
  15. a base
  16. True
  17. neutral
  18. use only kitchen items
  19. False
  20. a comb
  21. True
  22. soap water is a base
  23. an acid
  24. we keep it the same
  25. reddish
  26. False
  27. it stays yellow
  28. True
  29. reddish-brown
  30. not needed
  31. True
  32. stays yellow
  33. not needed
  34. a battery cell
  35. a dropper or spoon
  36. a mirror
  37. False
  38. True
  39. a balloon
  40. neutral

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