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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 746 · 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.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) soap solution (d) baking soda water
  2. 2.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
  4. 4.True or false: plain water keeps turmeric yellow. (a) False (b) True
  5. 5.🛟 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
  6. 6.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
  7. 7.🫧 Which of these is neutral? (a) salt water (b) orange juice (c) lemon juice (d) detergent water
  8. 8.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
  9. 9.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a magnet (d) a pulley
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) white paper strips (c) yeast (d) a dropper or spoon
  11. 11.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns black (c) it stays yellow (d) it turns blue
  12. 12.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  13. 13.🫧 Which of these is neutral? (a) orange juice (b) plain water (c) soap solution (d) curd
  14. 14.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the light we look in (c) the colour we see (d) the liquid we test
  16. 16.🫧 Which of these is a base? (a) lemon juice (b) orange juice (c) detergent water (d) plain water
  17. 17.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
  19. 19.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) lemon juice (c) tamarind water (d) salt water
  21. 21.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  22. 22.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) soap solution (d) a magnet
  24. 24.🧺 Which of these is not needed for the turmeric test? (a) water (b) a mirror (c) turmeric powder (d) lemon juice
  25. 25.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  26. 26.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  27. 27.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  28. 28.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  29. 29.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) tamarind water (d) vinegar
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) soap solution (d) a comb
  31. 31.🫧 Which of these is a base? (a) salt water (b) soap solution (c) sugar water (d) orange juice
  32. 32.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
  33. 33.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) lemon juice (c) soap solution (d) baking soda water
  34. 34.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  35. 35.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  36. 36.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  37. 37.🔍 Which is the odd one out? (a) plain water (b) salt water (c) tamarind water (d) soap solution
  38. 38.True or false: baking soda water is neutral. (a) True (b) False
  39. 39.True or false: salt water is neutral. (a) False (b) True
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) False (b) True

Answer key

  1. sugar water
  2. reddish-brown
  3. False
  4. True
  5. use only kitchen items
  6. vinegar
  7. salt water
  8. plain water
  9. an indicator
  10. yeast
  11. it stays yellow
  12. needed
  13. plain water
  14. stays yellow
  15. the colour we see
  16. detergent water
  17. turns reddish-brown
  18. reddish
  19. plain water
  20. detergent water
  21. not needed
  22. neutral
  23. a magnet
  24. a mirror
  25. False
  26. a base
  27. needed
  28. False
  29. detergent water
  30. a comb
  31. soap solution
  32. it turns yellow again
  33. lemon juice
  34. False
  35. a base
  36. turns reddish-brown
  37. soap solution
  38. False
  39. True
  40. False

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