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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 570 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
  2. 2.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) lemon juice (c) a dropper or spoon (d) a mirror
  3. 3.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) plain water (c) soap solution (d) salt water
  4. 4.True or false: curd is an acid. (a) False (b) True
  5. 5.True or false: yeast is needed for the turmeric test. (a) True (b) False
  6. 6.True or false: plain water is an acid. (a) False (b) True
  7. 7.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) tamarind water (d) soap solution
  8. 8.🫧 Is tamarind water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a battery cell (d) a dropper or spoon
  10. 10.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) soap solution (d) detergent water
  11. 11.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) lemon juice (d) a mirror
  12. 12.🫧 Which of these is a base? (a) plain water (b) detergent water (c) tamarind water (d) curd
  13. 13.📘 What do we call something that changes colour to show an acid or a base? (a) a pulley (b) an indicator (c) a magnet (d) a prism
  14. 14.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) vinegar
  15. 15.🫧 Which of these is a base? (a) vinegar (b) plain water (c) lemon juice (d) baking soda water
  16. 16.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) plain water (c) baking soda water (d) soap solution
  17. 17.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) white paper strips (c) a dropper or spoon (d) a balloon
  18. 18.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is an acid (d) soap is hot
  19. 19.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) use only kitchen items (d) sip each liquid
  20. 20.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  21. 21.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
  22. 22.True or false: soap solution keeps turmeric yellow. (a) True (b) False
  23. 23.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) lemon juice
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) soap solution (d) a magnet
  25. 25.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  26. 26.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  27. 27.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  28. 28.True or false: plain water is neutral. (a) False (b) True
  29. 29.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a comb (d) water
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) yeast (c) lemon juice (d) a dropper or spoon
  31. 31.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  32. 32.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  33. 33.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  34. 34.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
  35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns black (c) it turns red (d) it turns blue
  36. 36.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a dropper or spoon (c) a comb (d) a balloon
  37. 37.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  38. 38.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
  39. 39.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
  40. 40.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) an old shirt or apron (d) a white party dress

Answer key

  1. True
  2. a mirror
  3. soap solution
  4. True
  5. False
  6. False
  7. soap solution
  8. an acid
  9. a battery cell
  10. salt water
  11. lemon juice
  12. detergent water
  13. an indicator
  14. vinegar
  15. baking soda water
  16. plain water
  17. a balloon
  18. soap water is a base
  19. use only kitchen items
  20. True
  21. lemon juice
  22. False
  23. soap solution
  24. a magnet
  25. False
  26. True
  27. False
  28. True
  29. water
  30. yeast
  31. False
  32. needed
  33. a base
  34. reddish
  35. it stays yellow
  36. a dropper or spoon
  37. needed
  38. not needed
  39. not needed
  40. an old shirt or apron

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