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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 723 · 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.True or false: plain water is an acid. (a) False (b) True
  2. 2.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  3. 3.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a balloon (c) a battery cell (d) a magnet
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) turmeric powder (c) a battery cell (d) water
  5. 5.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  6. 6.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the light we look in (c) the liquid we test
  8. 8.🧺 Which of these is not needed for the turmeric test? (a) water (b) a balloon (c) turmeric powder (d) white paper strips
  9. 9.🧺 Which of these is needed for the turmeric test? (a) a comb (b) lemon juice (c) yeast (d) a balloon
  10. 10.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
  11. 11.🔍 Which is the odd one out? (a) soap solution (b) salt water (c) baking soda water (d) detergent water
  12. 12.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) soap solution (c) plain water (d) vinegar
  13. 13.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  14. 14.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  16. 16.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  17. 17.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a comb (c) water (d) white paper strips
  19. 19.True or false: a balloon is needed for the turmeric test. (a) False (b) True
  20. 20.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  21. 21.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) baking soda water (d) salt water
  22. 22.True or false: curd is neutral. (a) True (b) False
  23. 23.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) yeast (d) lemon juice
  24. 24.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  25. 25.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  26. 26.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  27. 27.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) lemon juice (d) detergent water
  28. 28.🫧 Which of these is an acid? (a) curd (b) soap solution (c) salt water (d) plain water
  29. 29.🫧 Is curd an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  30. 30.🧺 Do we need yeast for the turmeric test? (a) needed (b) not needed
  31. 31.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  32. 32.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) soap solution (d) plain water
  33. 33.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
  36. 36.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) bright blue (c) white at once (d) reddish
  37. 37.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  38. 38.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) plain water
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the liquid we test (d) the number of drops
  40. 40.🫧 Which of these is a base? (a) baking soda water (b) curd (c) vinegar (d) sugar water

Answer key

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

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