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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 85 · 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.🫧 Is salt water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  2. 2.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it stays yellow (c) it turns green (d) it turns blue
  3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the turmeric paper (c) the light we look in (d) the colour we see
  4. 4.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a battery cell (d) white paper strips
  5. 5.🫧 Which of these is an acid? (a) baking soda water (b) vinegar (c) sugar water (d) plain water
  6. 6.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  7. 7.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) plain water (c) soap solution (d) baking soda water
  8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) yeast (d) lemon juice
  9. 9.🧺 Which of these is not needed for the turmeric test? (a) a magnet (b) water (c) white paper strips (d) a dropper or spoon
  10. 10.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) an indicator (d) a magnet
  11. 11.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  12. 12.True or false: curd is neutral. (a) True (b) False
  13. 13.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  14. 14.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
  15. 15.True or false: a dropper or spoon is needed for the turmeric test. (a) False (b) True
  16. 16.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  17. 17.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  18. 18.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) reddish (c) white at once (d) green
  19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) turmeric powder (c) water (d) white paper strips
  20. 20.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  21. 21.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  22. 22.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) vinegar (c) detergent water (d) salt water
  23. 23.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it turns yellow again (d) it disappears
  24. 24.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
  25. 25.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed
  26. 26.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  27. 27.True or false: salt water keeps turmeric yellow. (a) False (b) True
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) water (d) a battery cell
  29. 29.🫧 Which of these is an acid? (a) orange juice (b) baking soda water (c) soap solution (d) sugar water
  30. 30.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  31. 31.True or false: yeast is needed for the turmeric test. (a) False (b) True
  32. 32.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) a magnet (d) a dropper or spoon
  34. 34.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  36. 36.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  37. 37.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) sugar water (d) baking soda water
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) tamarind water (c) baking soda water (d) sugar water
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  40. 40.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed

Answer key

  1. neutral
  2. reddish-brown
  3. the colour we see
  4. white paper strips
  5. vinegar
  6. True
  7. plain water
  8. yeast
  9. a magnet
  10. an indicator
  11. turns reddish-brown
  12. False
  13. True
  14. an old shirt or apron
  15. True
  16. True
  17. an acid
  18. reddish
  19. a comb
  20. turns reddish-brown
  21. False
  22. detergent water
  23. it turns yellow again
  24. True
  25. not needed
  26. True
  27. True
  28. a battery cell
  29. orange juice
  30. stays yellow
  31. False
  32. needed
  33. a magnet
  34. needed
  35. the turmeric paper
  36. an acid
  37. sugar water
  38. baking soda water
  39. we keep it the same
  40. needed

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