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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 113 · 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 needed for the turmeric test? (a) a balloon (b) a battery cell (c) water (d) a comb
  2. 2.⚖️ 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
  3. 3.🫧 Which of these is neutral? (a) tamarind water (b) plain water (c) soap solution (d) vinegar
  4. 4.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  5. 5.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  6. 6.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  7. 7.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  8. 8.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) salt water (c) vinegar (d) lemon juice
  9. 9.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
  10. 10.🫧 Which of these is an acid? (a) salt water (b) detergent water (c) soap solution (d) lemon juice
  11. 11.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) salt water (d) baking soda water
  12. 12.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) a white party dress (d) your school uniform
  13. 13.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) orange juice (d) salt water
  14. 14.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a mirror (c) soap solution (d) a dropper or spoon
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  17. 17.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  18. 18.🫧 Which of these is a base? (a) curd (b) soap solution (c) sugar water (d) vinegar
  19. 19.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  20. 20.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  22. 22.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) baking soda water (d) plain water
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  24. 24.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is hot (d) soap is an acid
  25. 25.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it turns green (d) it stays yellow
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  27. 27.True or false: salt water is neutral. (a) True (b) False
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) white paper strips (d) a battery cell
  29. 29.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  30. 30.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  31. 31.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  32. 32.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) detergent water (c) soap solution (d) baking soda water
  33. 33.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  34. 34.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) sugar water
  35. 35.True or false: tamarind water is neutral. (a) False (b) True
  36. 36.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the liquid we test (d) the colour we see
  38. 38.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) water (b) yeast (c) white paper strips (d) lemon juice
  40. 40.🔍 Which is the odd one out? (a) baking soda water (b) plain water (c) soap solution (d) detergent water

Answer key

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

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