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Turmeric Indicator Experiment Worksheet

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

Answer key

  1. soap solution
  2. True
  3. soap solution
  4. reddish
  5. neutral
  6. True
  7. we keep it the same
  8. we keep it the same
  9. a mirror
  10. True
  11. True
  12. tamarind water
  13. False
  14. True
  15. baking soda water
  16. False
  17. a dropper or spoon
  18. True
  19. a balloon
  20. it stays yellow
  21. an acid
  22. True
  23. a comb
  24. a comb
  25. vinegar
  26. needed
  27. not needed
  28. a mirror
  29. reddish-brown
  30. detergent water
  31. vinegar
  32. sugar water
  33. True
  34. baking soda water
  35. not needed
  36. we measure it
  37. stays yellow
  38. an acid
  39. tamarind water
  40. we keep it the same

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