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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 682 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) lemon juice (c) a mirror (d) turmeric powder
  2. 2.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) lemon juice (c) soap solution (d) vinegar
  3. 3.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  4. 4.⚖️ 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 light we look in (d) the liquid we test
  5. 5.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a dropper or spoon (d) a balloon
  6. 6.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your school uniform (d) your best clothes
  7. 7.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  9. 9.True or false: orange juice is neutral. (a) False (b) True
  10. 10.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  11. 11.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  12. 12.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a magnet (c) white paper strips (d) a mirror
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  15. 15.⚖️ 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
  16. 16.True or false: soap solution is a base. (a) False (b) True
  17. 17.True or false: vinegar is neutral. (a) True (b) False
  18. 18.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) yeast (d) lemon juice
  19. 19.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  20. 20.🔍 Which is the odd one out? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
  21. 21.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  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.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  24. 24.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  25. 25.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  26. 26.True or false: plain water is neutral. (a) True (b) False
  27. 27.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  28. 28.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) tamarind water (d) detergent water
  29. 29.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) soap solution (c) turmeric powder (d) water
  30. 30.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  31. 31.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) salt water (c) vinegar (d) baking soda water
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  33. 33.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  34. 34.🔍 Which is the odd one out? (a) tamarind water (b) plain water (c) vinegar (d) baking soda water
  35. 35.True or false: plain water is an acid. (a) True (b) False
  36. 36.🫧 Which of these is neutral? (a) plain water (b) soap solution (c) detergent water (d) tamarind water
  37. 37.True or false: vinegar is a base. (a) True (b) False
  38. 38.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
  39. 39.🫧 Which of these is neutral? (a) tamarind water (b) orange juice (c) curd (d) salt water
  40. 40.🫧 Is soap solution an acid, a base or neutral? (a) neutral (b) a base (c) an acid

Answer key

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

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