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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 886 · 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 keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  2. 2.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the liquid we test
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  5. 5.True or false: a mirror is needed for the turmeric test. (a) False (b) True
  6. 6.🛟 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
  7. 7.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  8. 8.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  9. 9.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  10. 10.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again
  11. 11.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  12. 12.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  13. 13.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) soap solution (d) plain water
  14. 14.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  15. 15.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) vinegar (d) plain water
  16. 16.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) water (c) turmeric powder (d) white paper strips
  17. 17.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  18. 18.True or false: salt water is a base. (a) True (b) False
  19. 19.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  20. 20.True or false: plain water is neutral. (a) True (b) False
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  22. 22.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) lemon juice (d) baking soda water
  23. 23.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  24. 24.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the turmeric paper
  26. 26.True or false: salt water is an acid. (a) False (b) True
  27. 27.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  28. 28.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  29. 29.🫧 Which of these is an acid? (a) salt water (b) curd (c) plain water (d) soap solution
  30. 30.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  31. 31.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  32. 32.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) orange juice (d) plain water
  33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) a dropper or spoon (c) turmeric powder (d) soap solution
  35. 35.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  36. 36.🫧 Which of these is neutral? (a) detergent water (b) curd (c) plain water (d) vinegar
  37. 37.🫧 Which of these is a base? (a) orange juice (b) sugar water (c) soap solution (d) vinegar
  38. 38.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  40. 40.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) a comb (d) water

Answer key

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

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