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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 888 · 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.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) soap solution (d) lemon juice
  2. 2.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  3. 3.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  4. 4.🔍 Which is the odd one out? (a) tamarind water (b) sugar water (c) detergent water (d) lemon juice
  5. 5.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) green (d) reddish
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) sugar water (c) lemon juice (d) baking soda water
  7. 7.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) turmeric powder (c) a magnet (d) water
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we measure it (c) we change it
  9. 9.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  10. 10.🫧 Which of these is neutral? (a) baking soda water (b) detergent water (c) vinegar (d) plain water
  11. 11.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  12. 12.True or false: baking soda water is neutral. (a) True (b) False
  13. 13.⚖️ 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
  14. 14.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  16. 16.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
  17. 17.⚖️ 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
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) True (b) False
  19. 19.True or false: orange juice is an acid. (a) False (b) True
  20. 20.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
  21. 21.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) a white party dress (d) an old shirt or apron
  22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) turmeric powder (d) a comb
  23. 23.True or false: sugar water is neutral. (a) False (b) True
  24. 24.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  25. 25.True or false: baking soda water is a base. (a) False (b) True
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  27. 27.True or false: salt water is an acid. (a) True (b) False
  28. 28.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the light we look in (c) the colour we see
  30. 30.True or false: a battery cell is needed for the turmeric test. (a) False (b) True
  31. 31.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a balloon (c) a comb (d) soap solution
  32. 32.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) lemon juice (d) yeast
  33. 33.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  34. 34.True or false: water is needed for the turmeric test. (a) True (b) False
  35. 35.🫧 Which of these is neutral? (a) salt water (b) vinegar (c) tamarind water (d) soap solution
  36. 36.True or false: soap solution is an acid. (a) False (b) True
  37. 37.⚖️ 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
  38. 38.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  39. 39.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  40. 40.True or false: salt water is neutral. (a) True (b) False

Answer key

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

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