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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 462 · 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 is an acid? (a) lemon juice (b) sugar water (c) soap solution (d) salt water
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we change it (c) we keep it the same
  3. 3.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  4. 4.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  5. 5.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) soap solution (d) sugar water
  6. 6.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  7. 7.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) yeast (d) water
  9. 9.⚖️ 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
  10. 10.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  11. 11.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.🫧 Which of these is neutral? (a) baking soda water (b) vinegar (c) detergent water (d) plain water
  13. 13.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard
  14. 14.🧺 Which of these is not needed for the turmeric test? (a) a comb (b) water (c) a dropper or spoon (d) turmeric powder
  15. 15.🫧 Which of these is an acid? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  16. 16.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  17. 17.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  18. 18.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  19. 19.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
  20. 20.🔮 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
  21. 21.True or false: vinegar is an acid. (a) True (b) False
  22. 22.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  23. 23.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a mirror (d) white paper strips
  24. 24.True or false: curd is an acid. (a) True (b) False
  25. 25.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  26. 26.True or false: sugar water is neutral. (a) False (b) True
  27. 27.⚖️ 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
  28. 28.True or false: tamarind water is neutral. (a) True (b) False
  29. 29.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  30. 30.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) water (c) turmeric powder (d) white paper strips
  32. 32.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  33. 33.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  34. 34.True or false: curd is neutral. (a) True (b) False
  35. 35.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  37. 37.🔮 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
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) sugar water (d) tamarind water
  39. 39.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) bright blue (d) reddish-brown
  40. 40.⚖️ 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

Answer key

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

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