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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 174 · 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.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  2. 2.🫧 Which of these is an acid? (a) sugar water (b) soap solution (c) curd (d) plain water
  3. 3.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) white paper strips (c) a balloon (d) water
  4. 4.True or false: water is not needed for the turmeric test. (a) True (b) False
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the number of drops (c) the colour we see
  6. 6.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
  7. 7.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) white paper strips (c) yeast (d) a balloon
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) a dropper or spoon (d) yeast
  9. 9.⚖️ 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
  10. 10.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) sugar water (c) detergent water (d) lemon juice
  11. 11.🫧 Which of these is neutral? (a) lemon juice (b) tamarind water (c) plain water (d) detergent water
  12. 12.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  13. 13.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) vinegar
  14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  15. 15.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) baking soda water (d) vinegar
  16. 16.🫧 Which of these is a base? (a) salt water (b) lemon juice (c) curd (d) soap solution
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) tamarind water (d) soap solution
  18. 18.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
  19. 19.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) tamarind water (d) lemon juice
  20. 20.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  21. 21.True or false: lemon juice is an acid. (a) False (b) True
  22. 22.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  24. 24.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  26. 26.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  27. 27.⚖️ 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
  28. 28.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  30. 30.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  31. 31.True or false: plain water is neutral. (a) False (b) True
  32. 32.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
  33. 33.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  34. 34.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  35. 35.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
  36. 36.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  37. 37.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
  38. 38.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  39. 39.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  40. 40.True or false: a magnet is not needed for the turmeric test. (a) False (b) True

Answer key

  1. not needed
  2. curd
  3. a balloon
  4. False
  5. the number of drops
  6. sugar water
  7. white paper strips
  8. yeast
  9. we keep it the same
  10. detergent water
  11. plain water
  12. a base
  13. vinegar
  14. reddish-brown
  15. baking soda water
  16. soap solution
  17. soap solution
  18. use only kitchen items
  19. soap solution
  20. reddish
  21. True
  22. False
  23. False
  24. plain water
  25. False
  26. an acid
  27. True
  28. needed
  29. False
  30. stays yellow
  31. True
  32. sugar water
  33. False
  34. needed
  35. lemon juice
  36. True
  37. vinegar
  38. stays yellow
  39. an acid
  40. True

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