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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 245 · 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) sugar water (b) plain water (c) lemon juice (d) baking soda water
  2. 2.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  3. 3.🧺 Which of these is needed for the turmeric test? (a) a comb (b) yeast (c) a balloon (d) lemon juice
  4. 4.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
  5. 5.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a comb (c) soap solution (d) lemon juice
  7. 7.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  8. 8.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  9. 9.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) plain water (c) detergent water (d) baking soda water
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  11. 11.🫧 Which of these is a base? (a) plain water (b) salt water (c) soap solution (d) lemon juice
  12. 12.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
  14. 14.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  15. 15.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  16. 16.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  17. 17.🛟 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
  18. 18.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  19. 19.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  20. 20.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a mirror (c) a dropper or spoon (d) a magnet
  21. 21.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  22. 22.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a mirror (c) a magnet (d) soap solution
  23. 23.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  24. 24.🟡 Which of these keeps turmeric yellow? (a) sugar water (b) baking soda water (c) detergent water (d) soap solution
  25. 25.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) detergent water (d) orange juice
  26. 26.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  27. 27.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  28. 28.🫧 Which of these is a base? (a) detergent water (b) plain water (c) sugar water (d) tamarind water
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
  30. 30.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  31. 31.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  32. 32.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  33. 33.🔍 Which is the odd one out? (a) vinegar (b) plain water (c) detergent water (d) sugar water
  34. 34.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  35. 35.True or false: water is not needed for the turmeric test. (a) True (b) False
  36. 36.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap is magnetic (d) soap water is a base
  37. 37.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  38. 38.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
  39. 39.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.True or false: lemon juice is neutral. (a) False (b) True

Answer key

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

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