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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 365 · 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 number of drops (b) the light we look in (c) the liquid we test (d) the colour we see
  2. 2.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) baking soda water (d) soap solution
  3. 3.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  4. 4.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) vinegar (d) baking soda water
  5. 5.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) plain water
  6. 6.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  7. 7.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  8. 8.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your best clothes (c) your school uniform (d) a white party dress
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  10. 10.True or false: detergent water is a base. (a) True (b) False
  11. 11.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  12. 12.True or false: lemon juice is a base. (a) False (b) True
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the liquid we test
  14. 14.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  15. 15.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.🫧 Which of these is neutral? (a) sugar water (b) orange juice (c) vinegar (d) detergent water
  17. 17.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
  18. 18.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  19. 19.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) turmeric powder (c) white paper strips (d) a dropper or spoon
  20. 20.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) lemon juice (c) turmeric powder (d) a dropper or spoon
  22. 22.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  25. 25.🫧 Which of these is a base? (a) detergent water (b) salt water (c) vinegar (d) plain water
  26. 26.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  28. 28.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) detergent water (d) soap solution
  29. 29.🍋 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
  30. 30.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) lemon juice (c) a battery cell (d) yeast
  31. 31.True or false: yeast is needed for the turmeric test. (a) False (b) True
  32. 32.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) sugar water (d) vinegar
  33. 33.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) plain water (c) soap solution (d) sugar water
  34. 34.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  35. 35.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  37. 37.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
  38. 38.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) tamarind water (d) soap solution
  39. 39.True or false: lemon juice is an acid. (a) True (b) False
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it

Answer key

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

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