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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 283 · 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: curd is neutral. (a) True (b) False
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) water (c) turmeric powder (d) white paper strips
  3. 3.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  4. 4.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) soap solution (d) a dropper or spoon
  6. 6.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) tamarind water (d) plain water
  7. 7.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
  9. 9.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  10. 10.True or false: soap solution is a base. (a) False (b) True
  11. 11.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  12. 12.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) a prism (c) a magnet (d) an indicator
  13. 13.🔍 Which is the odd one out? (a) lemon juice (b) soap solution (c) detergent water (d) baking soda water
  14. 14.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  15. 15.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) bright blue (d) it stays white
  16. 16.🔍 Which is the odd one out? (a) plain water (b) salt water (c) vinegar (d) baking soda water
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  18. 18.True or false: lemon juice is neutral. (a) False (b) True
  19. 19.True or false: lemon juice is a base. (a) True (b) False
  20. 20.True or false: salt water keeps turmeric yellow. (a) False (b) True
  21. 21.True or false: plain water keeps turmeric yellow. (a) True (b) False
  22. 22.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) water (d) a battery cell
  23. 23.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  24. 24.⚖️ 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
  25. 25.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  26. 26.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
  27. 27.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) white paper strips (c) a battery cell (d) a magnet
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
  29. 29.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  30. 30.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  31. 31.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a comb (c) turmeric powder (d) soap solution
  32. 32.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
  33. 33.🫧 Which of these is an acid? (a) lemon juice (b) sugar water (c) soap solution (d) detergent water
  34. 34.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  35. 35.True or false: soap solution is needed for the turmeric test. (a) False (b) True
  36. 36.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) soap solution (d) sugar water
  37. 37.True or false: water is needed for the turmeric test. (a) False (b) True
  38. 38.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) a dropper or spoon (c) white paper strips (d) soap solution
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the number of drops (c) the colour we see (d) the liquid we test

Answer key

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

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