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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 736 · 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.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) yeast (d) white paper strips
  3. 3.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  4. 4.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  5. 5.🔮 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
  6. 6.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) yeast (c) turmeric powder (d) water
  7. 7.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) tamarind water (d) detergent water
  8. 8.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) sugar water (d) tamarind water
  9. 9.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) tamarind water (d) lemon juice
  10. 10.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  11. 11.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  12. 12.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  13. 13.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  14. 14.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) detergent water (d) orange juice
  15. 15.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  17. 17.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  18. 18.🔍 Which is the odd one out? (a) lemon juice (b) plain water (c) detergent water (d) vinegar
  19. 19.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  20. 20.⚖️ 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 turmeric paper (d) the liquid we test
  21. 21.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) vinegar (d) salt water
  22. 22.⚖️ 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
  23. 23.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  24. 24.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) bright blue (d) reddish-brown
  25. 25.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) yeast (c) a comb (d) a magnet
  26. 26.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  27. 27.True or false: water is needed for the turmeric test. (a) True (b) False
  28. 28.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) lemon juice (c) a dropper or spoon (d) white paper strips
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
  33. 33.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  34. 34.True or false: vinegar is neutral. (a) True (b) False
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  36. 36.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  37. 37.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  38. 38.True or false: detergent water is a base. (a) True (b) False
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) salt water (c) plain water (d) sugar water
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) False (b) True

Answer key

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

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