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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 314 · 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.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a comb (c) a dropper or spoon (d) water
  4. 4.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) a comb (d) a dropper or spoon
  5. 5.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  8. 8.True or false: plain water keeps turmeric yellow. (a) False (b) True
  9. 9.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) bright blue (d) it stays white
  10. 10.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the light we look in
  12. 12.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) yeast (c) turmeric powder (d) a dropper or spoon
  13. 13.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  14. 14.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  15. 15.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
  17. 17.🧺 Which of these is needed for the turmeric test? (a) yeast (b) turmeric powder (c) a mirror (d) a magnet
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
  19. 19.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  20. 20.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
  22. 22.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  23. 23.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  24. 24.🫧 Which of these is a base? (a) tamarind water (b) salt water (c) curd (d) baking soda water
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) a magnet (d) turmeric powder
  26. 26.🧺 Which of these is needed for the turmeric test? (a) a comb (b) lemon juice (c) a mirror (d) yeast
  27. 27.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  28. 28.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
  30. 30.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) sugar water (d) soap solution
  31. 31.True or false: plain water is neutral. (a) True (b) False
  32. 32.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  33. 33.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
  34. 34.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  35. 35.🫧 Which of these is an acid? (a) detergent water (b) vinegar (c) soap solution (d) salt water
  36. 36.🔮 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
  37. 37.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) detergent water (d) tamarind water
  39. 39.🫧 Which of these is neutral? (a) vinegar (b) plain water (c) soap solution (d) tamarind water
  40. 40.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) plain water (d) lemon juice

Answer key

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

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