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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 771 · 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: vinegar keeps turmeric yellow. (a) False (b) True
  2. 2.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  3. 3.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  4. 4.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  6. 6.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  7. 7.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the number of drops (d) the liquid we test
  9. 9.🫧 Which of these is neutral? (a) curd (b) detergent water (c) vinegar (d) plain water
  10. 10.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) soap solution (d) sugar water
  11. 11.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  12. 12.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) lemon juice (c) soap solution (d) white paper strips
  14. 14.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a magnet (c) a balloon (d) turmeric powder
  15. 15.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  16. 16.True or false: orange juice is an acid. (a) True (b) False
  17. 17.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) white paper strips (d) a mirror
  20. 20.🫧 Which of these is an acid? (a) sugar water (b) soap solution (c) baking soda water (d) tamarind water
  21. 21.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) vinegar (d) baking soda water
  22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
  23. 23.True or false: soap solution is a base. (a) True (b) False
  24. 24.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) tamarind water (c) lemon juice (d) soap solution
  25. 25.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
  26. 26.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) detergent water (d) tamarind water
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  28. 28.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) plain water (c) soap solution (d) baking soda water
  29. 29.🔍 Which is the odd one out? (a) salt water (b) detergent water (c) soap solution (d) baking soda water
  30. 30.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) green (c) bright blue (d) white at once
  31. 31.🫧 Which of these is a base? (a) soap solution (b) plain water (c) lemon juice (d) curd
  32. 32.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  33. 33.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  34. 34.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) yeast (c) a battery cell (d) a mirror
  35. 35.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) soap solution (d) yeast
  36. 36.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the light we look in (b) the colour we see (c) the liquid we test
  38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) yeast (d) white paper strips
  39. 39.True or false: salt water is an acid. (a) False (b) True
  40. 40.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) sugar water (d) lemon juice

Answer key

  1. True
  2. a base
  3. a base
  4. needed
  5. True
  6. turns reddish-brown
  7. needed
  8. the liquid we test
  9. plain water
  10. soap solution
  11. True
  12. False
  13. a comb
  14. turmeric powder
  15. not needed
  16. True
  17. use only kitchen items
  18. we change it
  19. a mirror
  20. tamarind water
  21. baking soda water
  22. the number of drops
  23. True
  24. soap solution
  25. reddish-brown
  26. detergent water
  27. True
  28. plain water
  29. salt water
  30. reddish
  31. soap solution
  32. turns reddish-brown
  33. an acid
  34. white paper strips
  35. soap solution
  36. True
  37. the light we look in
  38. yeast
  39. False
  40. detergent water

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