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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 148 · 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 plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  2. 2.🫧 Which of these is an acid? (a) plain water (b) vinegar (c) salt water (d) soap solution
  3. 3.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  4. 4.🫧 Which of these is a base? (a) salt water (b) tamarind water (c) orange juice (d) detergent water
  5. 5.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  6. 6.🫧 Which of these is a base? (a) lemon juice (b) orange juice (c) soap solution (d) tamarind water
  7. 7.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a pulley (c) an indicator (d) a prism
  8. 8.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
  9. 9.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  10. 10.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) sugar water (d) salt water
  11. 11.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) water (c) lemon juice (d) a mirror
  12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  13. 13.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) baking soda water (d) detergent water
  14. 14.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it disappears (d) it turns blue
  15. 15.🫧 Which of these is neutral? (a) orange juice (b) tamarind water (c) plain water (d) detergent water
  16. 16.True or false: sugar water is an acid. (a) False (b) True
  17. 17.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  18. 18.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) soap solution (d) baking soda water
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) white paper strips (c) a comb (d) yeast
  20. 20.True or false: salt water keeps turmeric yellow. (a) True (b) False
  21. 21.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  22. 22.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  23. 23.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
  24. 24.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) sugar water (d) salt water
  25. 25.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  26. 26.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a dropper or spoon (c) a magnet (d) white paper strips
  28. 28.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) salt water (d) sugar water
  29. 29.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
  30. 30.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) turmeric powder (d) a battery cell
  31. 31.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  32. 32.⚖️ 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
  33. 33.True or false: detergent water is a base. (a) True (b) False
  34. 34.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a mirror (d) turmeric powder
  35. 35.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  36. 36.True or false: baking soda water is a base. (a) False (b) True
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
  38. 38.🫧 Is detergent water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  39. 39.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) reddish-brown (c) it stays white (d) green
  40. 40.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) vinegar (c) soap solution (d) lemon juice

Answer key

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

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