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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 408 · 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.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.True or false: plain water is neutral. (a) False (b) True
  3. 3.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  4. 4.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  5. 5.⚖️ 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
  6. 6.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
  7. 7.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) soap solution (d) baking soda water
  8. 8.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  9. 9.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) lemon juice
  10. 10.True or false: tamarind water is an acid. (a) False (b) True
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
  12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a magnet (d) soap solution
  13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
  14. 14.True or false: yeast is not needed for the turmeric test. (a) True (b) False
  15. 15.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  16. 16.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  18. 18.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
  19. 19.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a balloon (c) yeast (d) lemon juice
  20. 20.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  21. 21.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) a magnet (d) lemon juice
  22. 22.🔮 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
  23. 23.🫧 Which of these is a base? (a) vinegar (b) salt water (c) tamarind water (d) baking soda water
  24. 24.True or false: a comb is needed for the turmeric test. (a) True (b) False
  25. 25.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) vinegar (d) lemon juice
  26. 26.True or false: orange juice is neutral. (a) True (b) False
  27. 27.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  28. 28.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) detergent water (c) soap solution (d) baking soda water
  29. 29.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
  30. 30.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
  32. 32.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) soap solution (c) sugar water (d) lemon juice
  33. 33.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sip each liquid (d) sniff each bottle hard
  34. 34.True or false: vinegar turns turmeric reddish-brown. (a) False (b) True
  35. 35.True or false: detergent water keeps turmeric yellow. (a) False (b) True
  36. 36.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) plain water (d) detergent water
  37. 37.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) it stays white (d) bright blue
  38. 38.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
  39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a mirror (c) white paper strips (d) water
  40. 40.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) an old shirt or apron (c) a white party dress (d) your best clothes

Answer key

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

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