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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 206 · 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.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  2. 2.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) green (d) white at once
  3. 3.🫧 Which of these is a base? (a) detergent water (b) lemon juice (c) plain water (d) vinegar
  4. 4.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  5. 5.🫧 Which of these is an acid? (a) salt water (b) plain water (c) baking soda water (d) tamarind water
  6. 6.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
  7. 7.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  8. 8.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  10. 10.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we measure it (c) we change it
  12. 12.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  13. 13.True or false: plain water is neutral. (a) False (b) True
  14. 14.True or false: vinegar is a base. (a) True (b) False
  15. 15.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  16. 16.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  17. 17.🫧 Is baking soda water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  18. 18.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) a comb (d) soap solution
  19. 19.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) detergent water (d) soap solution
  20. 20.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) soap solution (c) a magnet (d) turmeric powder
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) vinegar (c) soap solution (d) sugar water
  23. 23.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) a mirror (d) a dropper or spoon
  24. 24.🫧 Which of these is a base? (a) orange juice (b) vinegar (c) baking soda water (d) sugar water
  25. 25.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
  26. 26.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  27. 27.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
  28. 28.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) plain water (d) baking soda water
  29. 29.🫧 Which of these is an acid? (a) salt water (b) detergent water (c) baking soda water (d) lemon juice
  30. 30.True or false: detergent water is a base. (a) False (b) True
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the number of drops (b) the liquid we test (c) the colour we see
  32. 32.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
  33. 33.True or false: a comb is needed for the turmeric test. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) soap solution (b) tamarind water (c) baking soda water (d) detergent water
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) soap solution (d) a balloon
  36. 36.True or false: curd is neutral. (a) True (b) False
  37. 37.True or false: water is needed for the turmeric test. (a) True (b) False
  38. 38.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
  39. 39.True or false: a magnet is needed for the turmeric test. (a) False (b) True
  40. 40.🧺 Which of these is needed for the turmeric test? (a) water (b) a mirror (c) yeast (d) a battery cell

Answer key

  1. needed
  2. reddish
  3. detergent water
  4. False
  5. tamarind water
  6. it stays yellow
  7. turns reddish-brown
  8. needed
  9. we measure it
  10. True
  11. we keep it the same
  12. needed
  13. True
  14. False
  15. False
  16. an acid
  17. a base
  18. a comb
  19. lemon juice
  20. tamarind water
  21. a magnet
  22. soap solution
  23. a mirror
  24. baking soda water
  25. lemon juice
  26. False
  27. it turns yellow again
  28. baking soda water
  29. lemon juice
  30. True
  31. the number of drops
  32. use only kitchen items
  33. False
  34. tamarind water
  35. a balloon
  36. False
  37. True
  38. reddish-brown
  39. False
  40. water

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