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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 435 · 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.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the number of drops
  3. 3.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) plain water (d) detergent water
  4. 4.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a mirror (d) a dropper or spoon
  5. 5.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) lemon juice (d) detergent water
  6. 6.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  7. 7.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) soap solution (d) sugar water
  8. 8.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the colour we see (c) the turmeric paper (d) the number of drops
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
  11. 11.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) baking soda water (d) soap solution
  12. 12.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  13. 13.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it turns darker red (d) it disappears
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  15. 15.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) white paper strips (c) lemon juice (d) a balloon
  17. 17.🫧 Which of these is a base? (a) soap solution (b) salt water (c) lemon juice (d) curd
  18. 18.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) detergent water (c) lemon juice (d) salt water
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) lemon juice (d) a battery cell
  22. 22.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  24. 24.🛟 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
  25. 25.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  26. 26.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  27. 27.True or false: detergent water is an acid. (a) True (b) False
  28. 28.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  29. 29.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  31. 31.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  32. 32.True or false: baking soda water is an acid. (a) False (b) True
  33. 33.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a mirror (c) a magnet (d) a balloon
  34. 34.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  35. 35.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) salt water
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) lemon juice (d) a magnet
  37. 37.True or false: sugar water is a base. (a) True (b) False
  38. 38.True or false: tamarind water is an acid. (a) False (b) True
  39. 39.True or false: detergent water is a base. (a) False (b) True
  40. 40.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) detergent water (d) baking soda water

Answer key

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

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