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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 487 · 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.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  2. 2.True or false: water is not needed for the turmeric test. (a) False (b) True
  3. 3.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  4. 4.True or false: orange juice is a base. (a) False (b) True
  5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) reddish-brown (d) it stays yellow
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) a balloon (d) soap solution
  7. 7.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  8. 8.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  9. 9.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
  10. 10.True or false: lemon juice is an acid. (a) True (b) False
  11. 11.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) a dropper or spoon (d) a mirror
  12. 12.True or false: curd is a base. (a) True (b) False
  13. 13.True or false: water is needed for the turmeric test. (a) False (b) True
  14. 14.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) green (d) it stays white
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the liquid we test (d) the colour we see
  16. 16.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  18. 18.🔮 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
  19. 19.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) plain water
  20. 20.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) salt water (d) tamarind water
  21. 21.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) yeast (d) a dropper or spoon
  22. 22.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  23. 23.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a magnet (c) water (d) soap solution
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  26. 26.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  27. 27.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  28. 28.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  31. 31.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
  32. 32.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) soap solution (d) detergent water
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) white paper strips (c) soap solution (d) a magnet
  34. 34.True or false: curd is neutral. (a) True (b) False
  35. 35.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) orange juice (d) salt water
  36. 36.⚖️ 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
  37. 37.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns blue (d) it turns darker red
  38. 38.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a comb (d) white paper strips
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  40. 40.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown

Answer key

  1. an acid
  2. False
  3. False
  4. False
  5. reddish-brown
  6. a balloon
  7. neutral
  8. needed
  9. use only kitchen items
  10. True
  11. a mirror
  12. False
  13. True
  14. reddish-brown
  15. the liquid we test
  16. soap solution
  17. True
  18. it stays yellow
  19. plain water
  20. detergent water
  21. a dropper or spoon
  22. True
  23. True
  24. a magnet
  25. True
  26. needed
  27. False
  28. a base
  29. True
  30. False
  31. sugar water
  32. vinegar
  33. a magnet
  34. False
  35. baking soda water
  36. False
  37. it turns yellow again
  38. a comb
  39. we change it
  40. stays yellow

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