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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 907 · 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.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) soap solution (c) salt water (d) sugar water
  2. 2.True or false: curd is a base. (a) True (b) False
  3. 3.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  4. 4.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the liquid we test (c) the turmeric paper (d) the light we look in
  6. 6.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  7. 7.🫧 Which of these is a base? (a) sugar water (b) lemon juice (c) curd (d) baking soda water
  8. 8.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  9. 9.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) soap solution (d) tamarind water
  10. 10.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  11. 11.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) salt water
  12. 12.🔍 Which is the odd one out? (a) vinegar (b) baking soda water (c) soap solution (d) detergent water
  13. 13.⚖️ 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
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  15. 15.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) soap solution (d) a balloon
  16. 16.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  17. 17.🔍 Which is the odd one out? (a) sugar water (b) salt water (c) plain water (d) baking soda water
  18. 18.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) vinegar (d) detergent water
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
  20. 20.True or false: water is needed for the turmeric test. (a) True (b) False
  21. 21.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  22. 22.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
  24. 24.🫧 Which of these is a base? (a) curd (b) lemon juice (c) orange juice (d) detergent water
  25. 25.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  27. 27.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
  28. 28.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
  29. 29.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  30. 30.True or false: sugar water is neutral. (a) True (b) False
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) turmeric powder (c) lemon juice (d) a dropper or spoon
  32. 32.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) turmeric powder (c) a dropper or spoon (d) a magnet
  34. 34.🫧 Which of these is a base? (a) vinegar (b) curd (c) lemon juice (d) soap solution
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the turmeric paper
  36. 36.True or false: salt water is a base. (a) False (b) True
  37. 37.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) soap solution (c) sugar water (d) lemon juice
  38. 38.True or false: curd is an acid. (a) True (b) False
  39. 39.True or false: vinegar is an acid. (a) True (b) False
  40. 40.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow

Answer key

  1. soap solution
  2. False
  3. an acid
  4. not needed
  5. the liquid we test
  6. False
  7. baking soda water
  8. not needed
  9. soap solution
  10. False
  11. salt water
  12. vinegar
  13. we change it
  14. we keep it the same
  15. a balloon
  16. neutral
  17. baking soda water
  18. vinegar
  19. it stays yellow
  20. True
  21. False
  22. True
  23. True
  24. detergent water
  25. a base
  26. False
  27. reddish-brown
  28. plain water
  29. use only kitchen items
  30. True
  31. a magnet
  32. False
  33. a magnet
  34. soap solution
  35. the colour we see
  36. False
  37. soap solution
  38. True
  39. True
  40. it stays yellow

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