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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 433 · 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 lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the colour we see (d) the turmeric paper
  3. 3.True or false: salt water keeps turmeric yellow. (a) False (b) True
  4. 4.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.True or false: yeast is not needed for the turmeric test. (a) False (b) True
  6. 6.True or false: plain water is an acid. (a) False (b) True
  7. 7.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) a battery cell (d) lemon juice
  9. 9.🔮 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
  10. 10.🫧 Which of these is a base? (a) orange juice (b) curd (c) salt water (d) soap solution
  11. 11.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  12. 12.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) mix bathroom cleaners (d) use only kitchen items
  13. 13.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  14. 14.🧺 Which of these is needed for the turmeric test? (a) water (b) yeast (c) a mirror (d) a balloon
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) a mirror (d) water
  16. 16.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) baking soda water (d) lemon juice
  17. 17.⚖️ 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
  18. 18.True or false: lemon juice is a base. (a) True (b) False
  19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) bright blue (d) reddish-brown
  20. 20.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
  21. 21.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) tamarind water (d) soap solution
  22. 22.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) orange juice (d) baking soda water
  23. 23.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  24. 24.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) a dropper or spoon (c) soap solution (d) lemon juice
  26. 26.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) sugar water (d) detergent water
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  30. 30.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  31. 31.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  32. 32.🫧 Which of these is a base? (a) orange juice (b) baking soda water (c) lemon juice (d) vinegar
  33. 33.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  34. 34.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  35. 35.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) white paper strips (d) a comb
  36. 36.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) a magnet (d) lemon juice
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) water (d) a comb
  38. 38.True or false: plain water is neutral. (a) False (b) True
  39. 39.True or false: sugar water is neutral. (a) False (b) True
  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. an acid
  2. the liquid we test
  3. True
  4. turns reddish-brown
  5. True
  6. False
  7. True
  8. a battery cell
  9. reddish
  10. soap solution
  11. an acid
  12. use only kitchen items
  13. turns reddish-brown
  14. water
  15. a mirror
  16. baking soda water
  17. the turmeric paper
  18. False
  19. reddish-brown
  20. it stays yellow
  21. tamarind water
  22. orange juice
  23. not needed
  24. False
  25. a magnet
  26. detergent water
  27. we change it
  28. True
  29. True
  30. False
  31. turns reddish-brown
  32. baking soda water
  33. needed
  34. True
  35. a comb
  36. a magnet
  37. a comb
  38. True
  39. True
  40. True

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