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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 899 · 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: vinegar turns turmeric reddish-brown. (a) False (b) True
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
  3. 3.True or false: detergent water is an acid. (a) True (b) False
  4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  6. 6.True or false: orange juice is an acid. (a) False (b) True
  7. 7.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) white paper strips (d) a comb
  8. 8.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns green (c) it turns blue (d) reddish-brown
  9. 9.True or false: salt water is neutral. (a) False (b) True
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a balloon (c) water (d) white paper strips
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a balloon (c) water (d) turmeric powder
  12. 12.🫧 Which of these is a base? (a) curd (b) vinegar (c) orange juice (d) baking soda water
  13. 13.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a battery cell (c) a mirror (d) water
  14. 14.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  15. 15.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.⚖️ 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 light we look in (c) the colour we see (d) the liquid we test
  17. 17.🟡 Which of these keeps turmeric yellow? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
  18. 18.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  19. 19.⚖️ 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
  20. 20.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) tamarind water (d) detergent water
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  22. 22.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) detergent water (c) baking soda water (d) soap solution
  23. 23.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  25. 25.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) soap solution (d) detergent water
  26. 26.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
  27. 27.True or false: detergent water is a base. (a) True (b) False
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the light we look in
  29. 29.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  30. 30.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  31. 31.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  32. 32.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
  33. 33.True or false: a comb is needed for the turmeric test. (a) False (b) True
  34. 34.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
  35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) white paper strips (d) a battery cell
  36. 36.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  38. 38.True or false: sugar water keeps turmeric yellow. (a) True (b) False
  39. 39.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.⚖️ 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 measure it (c) we keep it the same

Answer key

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

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