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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 280 · 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 the one thing we change? (a) the colour we see (b) the liquid we test (c) the number of drops (d) the turmeric paper
  2. 2.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  3. 3.⚖️ 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 liquid we test (d) the colour we see
  4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a magnet (d) a dropper or spoon
  5. 5.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  6. 6.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
  7. 7.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
  8. 8.True or false: vinegar is an acid. (a) False (b) True
  9. 9.🧺 Which of these is needed for the turmeric test? (a) yeast (b) white paper strips (c) a mirror (d) a magnet
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  11. 11.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  12. 12.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  13. 13.🫧 Which of these is a base? (a) detergent water (b) curd (c) plain water (d) tamarind water
  14. 14.⚖️ 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
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) lemon juice (d) yeast
  16. 16.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  17. 17.True or false: salt water keeps turmeric yellow. (a) True (b) False
  18. 18.🟡 Which of these keeps turmeric yellow? (a) salt water (b) baking soda water (c) soap solution (d) detergent water
  19. 19.True or false: vinegar is neutral. (a) True (b) False
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) soap solution (c) a battery cell (d) a dropper or spoon
  21. 21.🫧 Which of these is a base? (a) sugar water (b) lemon juice (c) salt water (d) baking soda water
  22. 22.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  23. 23.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  24. 24.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) soap solution (c) detergent water (d) baking soda water
  25. 25.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  26. 26.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.True or false: soap solution is a base. (a) True (b) False
  28. 28.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
  29. 29.True or false: baking soda water is a base. (a) False (b) True
  30. 30.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
  31. 31.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  32. 32.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a balloon (c) lemon juice (d) a dropper or spoon
  33. 33.True or false: yeast is needed for the turmeric test. (a) False (b) True
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  35. 35.True or false: vinegar keeps turmeric yellow. (a) True (b) False
  36. 36.🔮 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
  37. 37.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  38. 38.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
  40. 40.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap is an acid (d) soap water is a base

Answer key

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

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