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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 268 · 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.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) lemon juice (c) a dropper or spoon (d) a battery cell
  3. 3.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  4. 4.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) turmeric powder (d) a balloon
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) tamarind water (d) plain water
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  8. 8.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
  9. 9.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  10. 10.🫧 Which of these is neutral? (a) salt water (b) lemon juice (c) soap solution (d) detergent water
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a mirror (c) white paper strips (d) yeast
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  13. 13.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  14. 14.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
  16. 16.🫧 Which of these is neutral? (a) baking soda water (b) lemon juice (c) plain water (d) vinegar
  17. 17.True or false: salt water keeps turmeric yellow. (a) False (b) True
  18. 18.🫧 Which of these is an acid? (a) tamarind water (b) soap solution (c) sugar water (d) baking soda water
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  21. 21.⚖️ 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
  22. 22.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  23. 23.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.True or false: curd is an acid. (a) False (b) True
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the light we look in (c) the number of drops (d) the liquid we test
  26. 26.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  27. 27.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) a mirror (d) turmeric powder
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  30. 30.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) vinegar (c) detergent water (d) soap solution
  31. 31.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  32. 32.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  33. 33.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  34. 34.True or false: plain water is neutral. (a) False (b) True
  35. 35.🫧 Which of these is an acid? (a) salt water (b) baking soda water (c) detergent water (d) vinegar
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  37. 37.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  38. 38.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap water is a base (d) soap is magnetic
  39. 39.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) vinegar (d) salt water
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False

Answer key

  1. salt water
  2. a battery cell
  3. True
  4. False
  5. a balloon
  6. baking soda water
  7. we measure it
  8. reddish-brown
  9. stays yellow
  10. salt water
  11. white paper strips
  12. we keep it the same
  13. True
  14. False
  15. the number of drops
  16. plain water
  17. True
  18. tamarind water
  19. it stays yellow
  20. False
  21. we keep it the same
  22. False
  23. stays yellow
  24. True
  25. the liquid we test
  26. not needed
  27. False
  28. a mirror
  29. False
  30. vinegar
  31. a base
  32. a base
  33. an old shirt or apron
  34. True
  35. vinegar
  36. True
  37. True
  38. soap water is a base
  39. baking soda water
  40. False

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