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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 852 · 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: a mirror is not needed for the turmeric test. (a) True (b) False
  2. 2.True or false: sugar water is a base. (a) False (b) True
  3. 3.⚖️ 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
  4. 4.⚖️ 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
  5. 5.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  6. 6.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  7. 7.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  8. 8.True or false: tamarind water is neutral. (a) True (b) False
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) yeast (d) a dropper or spoon
  10. 10.🔍 Which is the odd one out? (a) vinegar (b) detergent water (c) soap solution (d) baking soda water
  11. 11.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.True or false: orange juice is neutral. (a) True (b) False
  13. 13.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) soap solution (d) lemon juice
  14. 14.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) a dropper or spoon (d) a balloon
  15. 15.True or false: soap solution is neutral. (a) False (b) True
  16. 16.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  17. 17.⚖️ 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
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the liquid we test (d) the light we look in
  19. 19.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  20. 20.⚖️ 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
  21. 21.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  22. 22.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  23. 23.🫧 Which of these is a base? (a) orange juice (b) vinegar (c) baking soda water (d) curd
  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.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
  26. 26.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  27. 27.True or false: detergent water is an acid. (a) False (b) True
  28. 28.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) tamarind water (d) sugar water
  29. 29.🫧 Which of these is neutral? (a) sugar water (b) baking soda water (c) lemon juice (d) tamarind water
  30. 30.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
  31. 31.True or false: curd is a base. (a) True (b) False
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) a magnet (d) water
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the colour we see (d) the light we look in
  35. 35.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  36. 36.True or false: baking soda water turns turmeric reddish-brown. (a) True (b) False
  37. 37.⚖️ 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
  38. 38.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) detergent water (d) lemon juice
  39. 39.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  40. 40.⚖️ 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

Answer key

  1. True
  2. False
  3. we keep it the same
  4. True
  5. needed
  6. False
  7. an acid
  8. False
  9. yeast
  10. vinegar
  11. stays yellow
  12. False
  13. soap solution
  14. a balloon
  15. False
  16. False
  17. we measure it
  18. the liquid we test
  19. not needed
  20. we keep it the same
  21. True
  22. turns reddish-brown
  23. baking soda water
  24. False
  25. reddish-brown
  26. False
  27. False
  28. baking soda water
  29. sugar water
  30. soap water is a base
  31. False
  32. the number of drops
  33. a magnet
  34. the colour we see
  35. stays yellow
  36. True
  37. we change it
  38. detergent water
  39. neutral
  40. True

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