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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 251 · 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.🫧 Is baking soda water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.True or false: a balloon is not needed for the turmeric test. (a) True (b) False
  3. 3.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
  4. 4.🔍 Which is the odd one out? (a) baking soda water (b) tamarind water (c) detergent water (d) soap solution
  5. 5.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
  6. 6.True or false: a comb is not needed for the turmeric test. (a) False (b) True
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a battery cell (d) a dropper or spoon
  8. 8.🛟 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
  9. 9.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a mirror (c) lemon juice (d) soap solution
  11. 11.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
  12. 12.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) use only kitchen items (c) mix bathroom cleaners (d) sniff each bottle hard
  13. 13.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  14. 14.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  15. 15.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) salt water (d) detergent water
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) salt water (c) plain water (d) soap solution
  17. 17.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  18. 18.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
  19. 19.True or false: orange juice is an acid. (a) True (b) False
  20. 20.🫧 Which of these is neutral? (a) orange juice (b) vinegar (c) plain water (d) curd
  21. 21.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) reddish-brown (d) it turns blue
  23. 23.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) reddish-brown (c) bright blue (d) green
  24. 24.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) yeast (d) a dropper or spoon
  25. 25.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) lemon juice (c) plain water (d) vinegar
  26. 26.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
  28. 28.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  29. 29.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  30. 30.🔍 Which is the odd one out? (a) soap solution (b) vinegar (c) lemon juice (d) salt water
  31. 31.True or false: salt water is neutral. (a) True (b) False
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
  33. 33.True or false: baking soda water is neutral. (a) True (b) False
  34. 34.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  36. 36.🫧 Which of these is an acid? (a) plain water (b) detergent water (c) sugar water (d) tamarind water
  37. 37.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  38. 38.⚖️ 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 keep it the same (c) we measure it
  39. 39.True or false: detergent water is an acid. (a) False (b) True
  40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False

Answer key

  1. a base
  2. True
  3. reddish
  4. tamarind water
  5. turns reddish-brown
  6. True
  7. a battery cell
  8. an old shirt or apron
  9. False
  10. a mirror
  11. False
  12. use only kitchen items
  13. needed
  14. True
  15. detergent water
  16. soap solution
  17. True
  18. lemon juice
  19. True
  20. plain water
  21. needed
  22. reddish-brown
  23. reddish-brown
  24. a dropper or spoon
  25. baking soda water
  26. turns reddish-brown
  27. the turmeric paper
  28. a base
  29. False
  30. soap solution
  31. True
  32. the number of drops
  33. False
  34. False
  35. we change it
  36. tamarind water
  37. not needed
  38. we keep it the same
  39. False
  40. False

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