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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 394 · 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 turmeric paper is what we measure. (a) True (b) False
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) lemon juice (c) a battery cell (d) white paper strips
  3. 3.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) mix bathroom cleaners (d) sniff each bottle hard
  4. 4.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the liquid we test
  6. 6.True or false: orange juice is a base. (a) False (b) True
  7. 7.🫧 Which of these is a base? (a) vinegar (b) salt water (c) detergent water (d) plain water
  8. 8.True or false: tamarind water is neutral. (a) True (b) False
  9. 9.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  10. 10.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  11. 11.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) it turns green (d) reddish-brown
  12. 12.🫧 Which of these is neutral? (a) orange juice (b) soap solution (c) detergent water (d) sugar water
  13. 13.🫧 Which of these is neutral? (a) soap solution (b) salt water (c) detergent water (d) curd
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  15. 15.True or false: detergent water is neutral. (a) True (b) False
  16. 16.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is an acid (d) soap is magnetic
  17. 17.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  18. 18.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  19. 19.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) lemon juice
  20. 20.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  21. 21.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) a mirror (d) soap solution
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  23. 23.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  24. 24.True or false: vinegar is a base. (a) False (b) True
  25. 25.True or false: soap solution is a base. (a) True (b) False
  26. 26.🫧 Which of these is an acid? (a) sugar water (b) baking soda water (c) vinegar (d) plain water
  27. 27.🫧 Which of these is a base? (a) lemon juice (b) tamarind water (c) curd (d) baking soda water
  28. 28.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  29. 29.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  30. 30.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  31. 31.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your school uniform (d) your best clothes
  32. 32.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  34. 34.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) a magnet (d) turmeric powder
  36. 36.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it turns yellow again (d) it disappears
  37. 37.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  39. 39.⚖️ 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
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True

Answer key

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

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