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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 97 · 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.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
  2. 2.⚖️ 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
  3. 3.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
  4. 4.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a balloon (c) lemon juice (d) white paper strips
  5. 5.True or false: baking soda water is an acid. (a) True (b) False
  6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we measure it (c) we keep it the same
  7. 7.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  8. 8.True or false: turmeric powder is not needed for the turmeric test. (a) False (b) True
  9. 9.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  10. 10.🫧 Is vinegar an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  11. 11.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) tamarind water (d) soap solution
  12. 12.🔍 Which is the odd one out? (a) sugar water (b) detergent water (c) baking soda water (d) soap solution
  13. 13.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) vinegar (c) soap solution (d) baking soda water
  14. 14.True or false: orange juice is neutral. (a) True (b) False
  15. 15.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the number of drops (d) the turmeric paper
  17. 17.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  18. 18.🧺 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
  19. 19.🍋 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
  20. 20.🔍 Which is the odd one out? (a) salt water (b) tamarind water (c) lemon juice (d) soap solution
  21. 21.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
  22. 22.True or false: a comb is needed for the turmeric test. (a) True (b) False
  23. 23.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
  24. 24.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) salt water (d) tamarind water
  25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the light we look in (c) the liquid we test (d) the turmeric paper
  26. 26.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) baking soda water (c) salt water (d) vinegar
  27. 27.True or false: soap solution is neutral. (a) False (b) True
  28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
  29. 29.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
  30. 30.True or false: turmeric powder is needed for the turmeric test. (a) True (b) False
  31. 31.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) yeast (c) water (d) soap solution
  32. 32.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is hot (c) soap is an acid (d) soap is magnetic
  33. 33.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  34. 34.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
  35. 35.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
  36. 36.🫧 Which of these is neutral? (a) curd (b) baking soda water (c) tamarind water (d) salt water
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a mirror (d) white paper strips
  38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
  39. 39.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
  40. 40.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) neutral (c) a base

Answer key

  1. False
  2. we measure it
  3. reddish
  4. a balloon
  5. False
  6. we keep it the same
  7. lemon juice
  8. False
  9. a base
  10. an acid
  11. tamarind water
  12. sugar water
  13. vinegar
  14. False
  15. an acid
  16. the colour we see
  17. True
  18. a battery cell
  19. it turns yellow again
  20. soap solution
  21. needed
  22. False
  23. use only kitchen items
  24. tamarind water
  25. the liquid we test
  26. baking soda water
  27. False
  28. we keep it the same
  29. stays yellow
  30. True
  31. yeast
  32. soap water is a base
  33. False
  34. reddish-brown
  35. not needed
  36. salt water
  37. a mirror
  38. True
  39. False
  40. neutral

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