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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 858 · 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.🫧 Which of these is an acid? (a) soap solution (b) sugar water (c) vinegar (d) detergent water
  2. 2.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
  3. 3.🧺 Do we need lemon juice for the turmeric test? (a) needed (b) not needed
  4. 4.True or false: salt water keeps turmeric yellow. (a) True (b) False
  5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
  6. 6.🫧 Which of these is an acid? (a) baking soda water (b) detergent water (c) curd (d) sugar water
  7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
  8. 8.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  9. 9.True or false: a comb is needed for the turmeric test. (a) True (b) False
  10. 10.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) a mirror (d) soap solution
  11. 11.🔮 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
  12. 12.🫧 Which of these is a base? (a) lemon juice (b) soap solution (c) curd (d) tamarind water
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a mirror (c) white paper strips (d) a magnet
  14. 14.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  15. 15.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) detergent water (d) baking soda water
  16. 16.🔍 Which is the odd one out? (a) tamarind water (b) vinegar (c) soap solution (d) salt water
  17. 17.🛟 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
  18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the liquid we test (c) the colour we see
  19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) bright blue (c) green (d) it stays white
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the turmeric paper (c) the liquid we test (d) the colour we see
  21. 21.True or false: vinegar is a base. (a) True (b) False
  22. 22.🧺 Do we need turmeric powder 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.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
  25. 25.🫧 Which of these is a base? (a) orange juice (b) sugar water (c) vinegar (d) detergent water
  26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) False (b) True
  27. 27.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) a dropper or spoon (c) water (d) soap solution
  29. 29.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
  30. 30.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a comb (d) a mirror
  31. 31.True or false: lemon juice is an acid. (a) True (b) False
  32. 32.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) your school uniform (d) an old shirt or apron
  33. 33.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  34. 34.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) a magnet (d) white paper strips
  35. 35.True or false: baking soda water is neutral. (a) False (b) True
  36. 36.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) soap solution (d) lemon juice
  37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a balloon (d) a dropper or spoon
  38. 38.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a balloon (c) yeast (d) a magnet
  39. 39.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) plain water (d) tamarind water
  40. 40.True or false: soap solution is needed for the turmeric test. (a) False (b) True

Answer key

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

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