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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 869 · 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 reddish-brown? (a) plain water (b) detergent water (c) tamarind water (d) vinegar
  2. 2.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  3. 3.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  4. 4.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  5. 5.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  6. 6.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) sugar water (d) soap solution
  7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) lemon juice (d) a comb
  8. 8.True or false: salt water keeps turmeric yellow. (a) True (b) False
  9. 9.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) orange juice (d) plain water
  10. 10.🧺 Do we need a battery cell for the turmeric test? (a) not needed (b) needed
  11. 11.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  12. 12.🧺 Which of these is needed for the turmeric test? (a) yeast (b) turmeric powder (c) a comb (d) a magnet
  13. 13.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  14. 14.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  15. 15.True or false: orange juice is a base. (a) False (b) True
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the colour we see (c) the turmeric paper (d) the liquid we test
  17. 17.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap water is a base (c) soap is magnetic (d) soap is hot
  18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it turns red (d) it stays yellow
  19. 19.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  20. 20.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) plain water (d) baking soda water
  21. 21.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
  22. 22.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
  23. 23.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns darker red (d) it turns blue
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
  25. 25.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
  26. 26.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
  27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) False (b) True
  28. 28.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
  29. 29.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  30. 30.True or false: soap solution keeps turmeric yellow. (a) False (b) True
  31. 31.🫧 Which of these is a base? (a) lemon juice (b) curd (c) soap solution (d) plain water
  32. 32.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  33. 33.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) a mirror (b) lemon juice (c) water (d) soap solution
  35. 35.True or false: tamarind water turns turmeric reddish-brown. (a) True (b) False
  36. 36.⚖️ 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
  37. 37.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a balloon (c) a dropper or spoon (d) white paper strips
  38. 38.True or false: a magnet is needed for the turmeric test. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) lemon juice (d) plain water
  40. 40.🧺 Do we need a balloon for the turmeric test? (a) needed (b) not needed

Answer key

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

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