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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 327 · 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.⚖️ 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
  2. 2.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) soap solution (c) detergent water (d) baking soda water
  3. 3.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) lemon juice (d) soap solution
  4. 4.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns black (b) it stays yellow (c) it turns blue (d) it turns red
  5. 5.True or false: water is needed for the turmeric test. (a) True (b) False
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) water (d) a comb
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) turmeric powder (c) a magnet (d) water
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the number of drops
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a dropper or spoon (c) water (d) a battery cell
  10. 10.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  11. 11.⚖️ 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 turmeric paper
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) yeast (c) soap solution (d) white paper strips
  13. 13.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  14. 14.True or false: plain water keeps turmeric yellow. (a) False (b) True
  15. 15.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  16. 16.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) yeast (d) soap solution
  17. 17.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sniff each bottle hard (d) sip each liquid
  18. 18.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  19. 19.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) plain water (c) sugar water (d) baking soda water
  20. 20.🧺 Which of these is needed for the turmeric test? (a) water (b) a magnet (c) a mirror (d) a battery cell
  21. 21.🫧 Which of these is neutral? (a) salt water (b) tamarind water (c) curd (d) soap solution
  22. 22.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) sugar water (d) plain water
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) turmeric powder (d) a balloon
  24. 24.🫧 Which of these is an acid? (a) tamarind water (b) salt water (c) baking soda water (d) detergent water
  25. 25.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  26. 26.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) yeast (c) white paper strips (d) a magnet
  27. 27.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  28. 28.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
  29. 29.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed
  31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) reddish-brown (c) it turns blue (d) it turns green
  32. 32.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  33. 33.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  35. 35.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) white at once (d) bright blue
  36. 36.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  37. 37.True or false: vinegar is an acid. (a) True (b) False
  38. 38.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
  39. 39.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  40. 40.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) vinegar (d) soap solution

Answer key

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

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