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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 161 · 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.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  2. 2.🫧 Which of these is neutral? (a) curd (b) sugar water (c) detergent water (d) orange juice
  3. 3.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  4. 4.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  5. 5.⚖️ 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 turmeric paper (c) the light we look in (d) the colour we see
  6. 6.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  8. 8.🧺 Which of these is needed for the turmeric test? (a) a comb (b) lemon juice (c) a mirror (d) a battery cell
  9. 9.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) plain water (c) sugar water (d) baking soda water
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) lemon juice (d) a balloon
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) True (b) False
  12. 12.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  13. 13.True or false: detergent water is a base. (a) True (b) False
  14. 14.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a prism (d) a magnet
  15. 15.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a mirror (c) soap solution (d) white paper strips
  16. 16.⚖️ 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 light we look in (d) the colour we see
  17. 17.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) vinegar
  18. 18.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
  20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) soap solution (d) a battery cell
  21. 21.True or false: curd is a base. (a) True (b) False
  22. 22.True or false: salt water is an acid. (a) False (b) True
  23. 23.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  24. 24.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) baking soda water (c) detergent water (d) soap solution
  25. 25.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) lemon juice (d) sugar water
  26. 26.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  27. 27.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  28. 28.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  29. 29.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a balloon (c) white paper strips (d) lemon juice
  30. 30.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  31. 31.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) reddish-brown (d) it stays white
  32. 32.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  33. 33.🫧 Which of these is an acid? (a) vinegar (b) detergent water (c) plain water (d) baking soda water
  34. 34.True or false: sugar water is neutral. (a) False (b) True
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  36. 36.True or false: lemon juice is a base. (a) True (b) False
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) white paper strips (d) a comb
  38. 38.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) tamarind water (d) baking soda water
  39. 39.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  40. 40.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed

Answer key

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

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