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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 402 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the colour we see (c) the turmeric paper (d) the liquid we test
  2. 2.🫧 Which of these is an acid? (a) lemon juice (b) detergent water (c) sugar water (d) salt water
  3. 3.⚖️ 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
  4. 4.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a dropper or spoon (c) a magnet (d) a mirror
  5. 5.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) white paper strips (c) turmeric powder (d) a dropper or spoon
  8. 8.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
  9. 9.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
  10. 10.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  11. 11.🫧 Which of these is an acid? (a) sugar water (b) vinegar (c) salt water (d) detergent water
  12. 12.⚖️ 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 liquid we test (d) the colour we see
  13. 13.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  14. 14.🫧 Which of these is a base? (a) plain water (b) soap solution (c) curd (d) vinegar
  15. 15.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) salt water (d) detergent water
  17. 17.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  18. 18.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  19. 19.True or false: soap solution is a base. (a) True (b) False
  20. 20.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) soap solution (d) a comb
  21. 21.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  22. 22.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) lemon juice (d) a comb
  23. 23.🫧 Which of these is neutral? (a) vinegar (b) lemon juice (c) salt water (d) soap solution
  24. 24.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
  25. 25.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  26. 26.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns blue (c) it stays yellow (d) it turns green
  27. 27.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) soap solution (d) vinegar
  28. 28.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
  29. 29.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  30. 30.🫧 Which of these is an acid? (a) curd (b) soap solution (c) detergent water (d) salt water
  31. 31.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) salt water (d) baking soda water
  32. 32.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
  33. 33.🫧 Which of these is neutral? (a) curd (b) vinegar (c) lemon juice (d) sugar water
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a mirror (c) water (d) a dropper or spoon
  35. 35.True or false: salt water is an acid. (a) True (b) False
  36. 36.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) soap solution (d) detergent water
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) turmeric powder (c) lemon juice (d) yeast
  38. 38.⚖️ 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
  39. 39.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  40. 40.🧺 Do we need a balloon for the turmeric test? (a) not needed (b) needed

Answer key

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

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