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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 565 · 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.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) reddish (d) white at once
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) yeast (c) soap solution (d) lemon juice
  4. 4.🫧 Which of these is neutral? (a) plain water (b) detergent water (c) soap solution (d) tamarind water
  5. 5.🫧 Which of these is neutral? (a) vinegar (b) detergent water (c) orange juice (d) salt water
  6. 6.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  7. 7.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
  8. 8.True or false: curd is an acid. (a) True (b) False
  9. 9.True or false: sugar water is neutral. (a) True (b) False
  10. 10.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  11. 11.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  12. 12.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) an old shirt or apron (c) your best clothes (d) your school uniform
  13. 13.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we keep it the same (c) we change it
  15. 15.True or false: a comb is needed for the turmeric test. (a) False (b) True
  16. 16.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  17. 17.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  18. 18.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  19. 19.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
  20. 20.True or false: lemon juice is a base. (a) True (b) False
  21. 21.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it turns blue (d) it stays yellow
  22. 22.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) salt water (c) tamarind water (d) detergent water
  23. 23.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  24. 24.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  25. 25.⚖️ 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 colour we see (c) the turmeric paper (d) the liquid we test
  26. 26.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) water (c) lemon juice (d) turmeric powder
  27. 27.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  28. 28.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a comb (c) soap solution (d) a balloon
  30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
  31. 31.True or false: sugar water is a base. (a) False (b) True
  32. 32.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
  33. 33.🧺 Which of these is not needed for the turmeric test? (a) yeast (b) a dropper or spoon (c) water (d) lemon juice
  34. 34.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
  35. 35.🫧 Which of these is an acid? (a) lemon juice (b) detergent water (c) salt water (d) soap solution
  36. 36.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  37. 37.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  38. 38.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
  40. 40.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) reddish-brown (c) it stays white (d) bright blue

Answer key

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

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