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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 465 · 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 of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) lemon juice (d) soap solution
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) a balloon (d) turmeric powder
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) a dropper or spoon (d) a magnet
  4. 4.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) lemon juice (d) yeast
  5. 5.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  6. 6.True or false: detergent water is neutral. (a) False (b) True
  7. 7.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a comb (c) water (d) white paper strips
  9. 9.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  10. 10.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  11. 11.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  12. 12.⚖️ 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 colour we see
  13. 13.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  14. 14.True or false: lemon juice is an acid. (a) False (b) True
  15. 15.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) sugar water (c) plain water (d) vinegar
  16. 16.True or false: plain water keeps turmeric yellow. (a) True (b) False
  17. 17.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns red (c) it turns blue (d) it turns black
  18. 18.True or false: tamarind water is an acid. (a) True (b) False
  19. 19.True or false: plain water is neutral. (a) True (b) False
  20. 20.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
  21. 21.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  22. 22.⚖️ 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
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the liquid we test (d) the light we look in
  24. 24.True or false: curd is an acid. (a) False (b) True
  25. 25.🫧 Which of these is a base? (a) sugar water (b) vinegar (c) detergent water (d) salt water
  26. 26.True or false: vinegar is a base. (a) False (b) True
  27. 27.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
  28. 28.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the liquid we test (c) the colour we see
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) True (b) False
  31. 31.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  32. 32.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) soap solution (d) a battery cell
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  36. 36.True or false: sugar water is neutral. (a) False (b) True
  37. 37.True or false: water is needed for the turmeric test. (a) False (b) True
  38. 38.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  39. 39.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) sugar water (d) baking soda water
  40. 40.🫧 Which of these is neutral? (a) tamarind water (b) lemon juice (c) baking soda water (d) salt water

Answer key

  1. soap solution
  2. a balloon
  3. a magnet
  4. lemon juice
  5. a base
  6. False
  7. use only kitchen items
  8. a comb
  9. an acid
  10. not needed
  11. needed
  12. the liquid we test
  13. not needed
  14. True
  15. soap solution
  16. True
  17. it stays yellow
  18. True
  19. True
  20. an old shirt or apron
  21. True
  22. we change it
  23. the colour we see
  24. True
  25. detergent water
  26. False
  27. reddish
  28. False
  29. the light we look in
  30. False
  31. lemon juice
  32. neutral
  33. a battery cell
  34. we keep it the same
  35. the turmeric paper
  36. True
  37. True
  38. stays yellow
  39. baking soda water
  40. salt water

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