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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 441 · 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.🟡 Which of these keeps turmeric yellow? (a) salt water (b) baking soda water (c) soap solution (d) detergent water
  2. 2.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
  3. 3.⚖️ 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
  4. 4.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap is hot (c) soap is an acid (d) soap water is a base
  6. 6.🧺 Do we need yeast for the turmeric test? (a) not needed (b) needed
  7. 7.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  8. 8.🧺 Which of these is needed for the turmeric test? (a) a comb (b) soap solution (c) a battery cell (d) a magnet
  9. 9.True or false: a mirror is needed for the turmeric test. (a) True (b) False
  10. 10.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  11. 11.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) sniff each bottle hard (d) mix bathroom cleaners
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  13. 13.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  14. 14.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) baking soda water (d) curd
  15. 15.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the colour we see (d) the turmeric paper
  17. 17.🫧 Which of these is neutral? (a) curd (b) sugar water (c) detergent water (d) baking soda water
  18. 18.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  19. 19.True or false: soap solution is a base. (a) True (b) False
  20. 20.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  21. 21.True or false: sugar water is neutral. (a) True (b) False
  22. 22.🫧 Which of these is neutral? (a) orange juice (b) detergent water (c) vinegar (d) salt water
  23. 23.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a dropper or spoon (d) a balloon
  25. 25.🔮 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
  26. 26.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
  27. 27.True or false: tamarind water is an acid. (a) False (b) True
  28. 28.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
  29. 29.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) turmeric powder (d) a magnet
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
  32. 32.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) vinegar (c) salt water (d) sugar water
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) a dropper or spoon (c) lemon juice (d) turmeric powder
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the turmeric paper (d) the colour we see
  35. 35.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  36. 36.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) turmeric powder (d) a comb
  37. 37.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) green (d) it stays white
  38. 38.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
  39. 39.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it stays yellow (c) it turns red (d) it turns blue
  40. 40.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral

Answer key

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

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