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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 612 · 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.True or false: curd is an acid. (a) False (b) True
  2. 2.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  3. 3.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  4. 4.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
  5. 5.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
  6. 6.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns black (d) it turns red
  7. 7.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) soap solution (d) lemon juice
  8. 8.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
  9. 9.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  10. 10.🫧 Which of these is neutral? (a) sugar water (b) curd (c) detergent water (d) soap solution
  11. 11.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  12. 12.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) baking soda water (d) detergent water
  13. 13.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  14. 14.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the light we look in
  16. 16.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  17. 17.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  18. 18.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  20. 20.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) sugar water (d) baking soda water
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) a dropper or spoon (c) lemon juice (d) turmeric powder
  22. 22.⚖️ 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
  23. 23.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  24. 24.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  25. 25.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  27. 27.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  28. 28.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  29. 29.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  30. 30.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) plain water (d) tamarind water
  31. 31.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns darker red (d) it turns blue
  33. 33.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) water (b) a mirror (c) a dropper or spoon (d) soap solution
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  37. 37.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a comb (d) yeast
  38. 38.🫧 Which of these is a base? (a) plain water (b) lemon juice (c) detergent water (d) orange juice
  39. 39.🫧 Which of these is neutral? (a) vinegar (b) baking soda water (c) tamarind water (d) plain water
  40. 40.True or false: tamarind water keeps turmeric yellow. (a) True (b) False

Answer key

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

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