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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 568 · 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 tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  2. 2.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  3. 3.True or false: soap solution is neutral. (a) True (b) False
  4. 4.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  6. 6.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) soap solution (d) plain water
  7. 7.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
  9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
  10. 10.🫧 Which of these is an acid? (a) plain water (b) tamarind water (c) detergent water (d) baking soda water
  11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
  12. 12.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
  13. 13.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) detergent water (c) baking soda water (d) soap solution
  14. 14.True or false: soap solution is needed for the turmeric test. (a) True (b) False
  15. 15.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
  16. 16.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  17. 17.⚖️ 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 measure it (c) we change it
  18. 18.True or false: water is not needed for the turmeric test. (a) True (b) False
  19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we change it (c) we measure it
  20. 20.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
  21. 21.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
  22. 22.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  23. 23.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) bright blue (d) green
  24. 24.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
  25. 25.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  26. 26.True or false: vinegar keeps turmeric yellow. (a) False (b) True
  27. 27.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  28. 28.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) soap solution (d) a battery cell
  29. 29.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) vinegar (d) tamarind water
  30. 30.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is an acid (c) soap water is a base (d) soap is magnetic
  31. 31.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
  32. 32.True or false: a balloon is needed for the turmeric test. (a) True (b) False
  33. 33.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) turmeric powder (d) a dropper or spoon
  34. 34.True or false: detergent water keeps turmeric yellow. (a) True (b) False
  35. 35.🫧 Which of these is neutral? (a) salt water (b) tamarind water (c) detergent water (d) curd
  36. 36.🛟 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
  37. 37.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
  38. 38.True or false: detergent water is a base. (a) False (b) True
  39. 39.🟡 Which of these turns turmeric reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) baking soda water
  40. 40.True or false: baking soda water keeps turmeric yellow. (a) False (b) True

Answer key

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

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