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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 217 · 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 turmeric paper is kept the same. (a) True (b) False
  2. 2.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  3. 3.🫧 Which of these is an acid? (a) vinegar (b) plain water (c) baking soda water (d) salt water
  4. 4.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) sugar water (d) soap solution
  5. 5.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  6. 6.True or false: plain water is neutral. (a) True (b) False
  7. 7.🔍 Which is the odd one out? (a) detergent water (b) tamarind water (c) salt water (d) plain water
  8. 8.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) your best clothes (d) a white party dress
  9. 9.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) an indicator (c) a prism (d) a pulley
  10. 10.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) lemon juice (d) soap solution
  11. 11.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
  12. 12.🔮 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
  13. 13.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) yeast (d) water
  14. 14.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
  15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we measure it (b) we keep it the same (c) we change it
  16. 16.True or false: baking soda water is a base. (a) False (b) True
  17. 17.True or false: a magnet is not needed for the turmeric test. (a) True (b) False
  18. 18.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) plain water (d) tamarind water
  19. 19.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns red (d) it turns black
  20. 20.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
  21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) lemon juice (c) white paper strips (d) soap solution
  22. 22.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) detergent water (d) baking soda water
  23. 23.🟡 Which of these turns turmeric reddish-brown? (a) baking soda water (b) sugar water (c) vinegar (d) tamarind water
  24. 24.🫧 Which of these is a base? (a) tamarind water (b) baking soda water (c) vinegar (d) orange juice
  25. 25.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  26. 26.🧺 Do we need a dropper or spoon for the turmeric test? (a) not needed (b) needed
  27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a dropper or spoon (d) a mirror
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
  30. 30.🟡 Turmeric paper meets salt water. 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.🫧 Is curd an acid, a base or neutral? (a) neutral (b) a base (c) an acid
  33. 33.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  34. 34.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
  35. 35.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) reddish-brown (d) bright blue
  36. 36.True or false: vinegar is an acid. (a) False (b) True
  37. 37.🫧 Which of these is neutral? (a) soap solution (b) plain water (c) detergent water (d) tamarind water
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the turmeric paper (c) the number of drops (d) the colour we see
  39. 39.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) turmeric powder (d) a battery cell
  40. 40.🫧 Which of these is a base? (a) orange juice (b) lemon juice (c) soap solution (d) tamarind water

Answer key

  1. True
  2. needed
  3. vinegar
  4. sugar water
  5. neutral
  6. True
  7. detergent water
  8. an old shirt or apron
  9. an indicator
  10. lemon juice
  11. needed
  12. reddish
  13. yeast
  14. use only kitchen items
  15. we keep it the same
  16. True
  17. True
  18. soap solution
  19. it stays yellow
  20. True
  21. a comb
  22. plain water
  23. baking soda water
  24. baking soda water
  25. an acid
  26. needed
  27. a mirror
  28. we measure it
  29. we change it
  30. stays yellow
  31. False
  32. an acid
  33. a base
  34. it stays yellow
  35. reddish-brown
  36. True
  37. plain water
  38. the liquid we test
  39. a battery cell
  40. soap solution

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