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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 874 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  2. 2.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  3. 3.🫧 Which of these is neutral? (a) curd (b) vinegar (c) salt water (d) soap solution
  4. 4.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  5. 5.🫧 Which of these is an acid? (a) lemon juice (b) salt water (c) baking soda water (d) sugar water
  6. 6.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  7. 7.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  8. 8.True or false: plain water keeps turmeric yellow. (a) True (b) False
  9. 9.⚖️ 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
  10. 10.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  11. 11.🫧 Which of these is an acid? (a) salt water (b) soap solution (c) orange juice (d) sugar water
  12. 12.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) yeast (d) soap solution
  14. 14.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  15. 15.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  16. 16.True or false: lemon juice is neutral. (a) False (b) True
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
  18. 18.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  19. 19.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  20. 20.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) sugar water (c) detergent water (d) soap solution
  21. 21.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  22. 22.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a magnet (c) a battery cell (d) a balloon
  23. 23.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is hot (c) soap water is a base (d) soap is magnetic
  24. 24.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  25. 25.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) lemon juice (c) a balloon (d) water
  26. 26.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
  28. 28.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a magnet (c) water (d) white paper strips
  30. 30.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) lemon juice
  31. 31.🟡 Which of these keeps turmeric yellow? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
  32. 32.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) plain water (d) baking soda water
  33. 33.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) detergent water (c) sugar water (d) tamarind water
  34. 34.🫧 Which of these is a base? (a) tamarind water (b) plain water (c) detergent water (d) lemon juice
  35. 35.True or false: salt water keeps turmeric yellow. (a) False (b) True
  36. 36.True or false: sugar water is neutral. (a) False (b) True
  37. 37.🫧 Which of these is an acid? (a) soap solution (b) plain water (c) salt water (d) curd
  38. 38.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  39. 39.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  40. 40.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard

Answer key

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

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