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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 698 · 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 turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  2. 2.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the light we look in (d) the colour we see
  4. 4.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) plain water (d) detergent water
  5. 5.True or false: orange juice is an acid. (a) False (b) True
  6. 6.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  7. 7.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  8. 8.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) green (d) reddish-brown
  9. 9.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) baking soda water (c) tamarind water (d) sugar water
  10. 10.🫧 Which of these is neutral? (a) tamarind water (b) vinegar (c) curd (d) sugar water
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  12. 12.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) sugar water (d) soap solution
  13. 13.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
  14. 14.🫧 Which of these is a base? (a) orange juice (b) soap solution (c) curd (d) salt water
  15. 15.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  16. 16.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  17. 17.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
  18. 18.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) plain water (c) lemon juice (d) sugar water
  19. 19.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  20. 20.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) lemon juice (d) soap solution
  23. 23.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  24. 24.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  25. 25.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  26. 26.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a balloon (c) soap solution (d) yeast
  27. 27.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) lemon juice
  28. 28.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  29. 29.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap water is a base (d) soap is an acid
  30. 30.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
  31. 31.🧺 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 balloon
  32. 32.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it turns blue (d) it disappears
  33. 33.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  35. 35.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
  37. 37.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  38. 38.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) baking soda water (d) vinegar
  39. 39.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
  40. 40.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow

Answer key

  1. soap solution
  2. not needed
  3. the liquid we test
  4. detergent water
  5. True
  6. False
  7. needed
  8. reddish-brown
  9. baking soda water
  10. sugar water
  11. use only kitchen items
  12. soap solution
  13. plain water
  14. soap solution
  15. True
  16. an acid
  17. vinegar
  18. soap solution
  19. False
  20. an old shirt or apron
  21. True
  22. a comb
  23. needed
  24. True
  25. False
  26. soap solution
  27. lemon juice
  28. not needed
  29. soap water is a base
  30. reddish-brown
  31. a balloon
  32. it turns yellow again
  33. stays yellow
  34. False
  35. neutral
  36. the light we look in
  37. it stays yellow
  38. baking soda water
  39. plain water
  40. stays yellow

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