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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 443 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a dropper or spoon (c) yeast (d) turmeric powder
  2. 2.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
  3. 3.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  4. 4.True or false: white paper strips is not needed for the turmeric test. (a) False (b) True
  5. 5.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the turmeric paper (d) the liquid we test
  7. 7.True or false: detergent water is a base. (a) True (b) False
  8. 8.🫧 Which of these is neutral? (a) curd (b) baking soda water (c) sugar water (d) lemon juice
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  10. 10.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a battery cell (c) lemon juice (d) a balloon
  11. 11.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it disappears (d) it turns yellow again
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a magnet (d) soap solution
  13. 13.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  14. 14.🫧 Which of these is a base? (a) soap solution (b) orange juice (c) vinegar (d) sugar water
  15. 15.🫧 Which of these is a base? (a) salt water (b) sugar water (c) baking soda water (d) vinegar
  16. 16.True or false: soap solution turns turmeric reddish-brown. (a) True (b) False
  17. 17.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  18. 18.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the liquid we test (c) the colour we see (d) the turmeric paper
  21. 21.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) plain water (d) detergent water
  22. 22.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  23. 23.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  24. 24.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) lemon juice (c) turmeric powder (d) a dropper or spoon
  25. 25.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  26. 26.🫧 Which of these is an acid? (a) soap solution (b) detergent water (c) plain water (d) orange juice
  27. 27.🔍 Which is the odd one out? (a) plain water (b) tamarind water (c) baking soda water (d) sugar water
  28. 28.True or false: salt water keeps turmeric yellow. (a) True (b) False
  29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
  30. 30.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
  31. 31.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
  32. 32.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  33. 33.True or false: curd is a base. (a) True (b) False
  34. 34.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  35. 35.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
  36. 36.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  37. 37.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  39. 39.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
  40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish

Answer key

  1. yeast
  2. use only kitchen items
  3. an acid
  4. False
  5. False
  6. the liquid we test
  7. True
  8. sugar water
  9. True
  10. lemon juice
  11. it turns yellow again
  12. a magnet
  13. False
  14. soap solution
  15. baking soda water
  16. True
  17. a base
  18. turns reddish-brown
  19. we measure it
  20. the colour we see
  21. plain water
  22. needed
  23. stays yellow
  24. a mirror
  25. needed
  26. orange juice
  27. baking soda water
  28. True
  29. the number of drops
  30. False
  31. it stays yellow
  32. False
  33. False
  34. needed
  35. soap water is a base
  36. a base
  37. neutral
  38. False
  39. salt water
  40. reddish

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