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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 100 · 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 neutral? (a) baking soda water (b) detergent water (c) sugar water (d) vinegar
  2. 2.🫧 Which of these is an acid? (a) curd (b) detergent water (c) plain water (d) salt water
  3. 3.True or false: soap solution turns turmeric reddish-brown. (a) False (b) True
  4. 4.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  5. 5.True or false: salt water is neutral. (a) True (b) False
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) yeast (c) water (d) soap solution
  7. 7.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  8. 8.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) detergent water (d) baking soda water
  9. 9.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) reddish-brown (d) it turns green
  10. 10.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) sugar water
  11. 11.True or false: water is not needed for the turmeric test. (a) False (b) True
  12. 12.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
  13. 13.True or false: yeast is needed for the turmeric test. (a) False (b) True
  14. 14.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
  15. 15.True or false: a comb is not needed for the turmeric test. (a) True (b) False
  16. 16.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  17. 17.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
  18. 18.⚖️ 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
  19. 19.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap is hot (d) soap water is a base
  20. 20.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) vinegar (d) baking soda water
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
  22. 22.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) salt water (c) detergent water (d) baking soda water
  23. 23.⚖️ 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 liquid we test (c) the number of drops (d) the turmeric paper
  24. 24.🫧 Which of these is a base? (a) curd (b) tamarind water (c) baking soda water (d) vinegar
  25. 25.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) white at once (c) reddish (d) green
  26. 26.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  27. 27.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
  28. 28.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) detergent water (d) tamarind water
  29. 29.True or false: white paper strips is needed for the turmeric test. (a) False (b) True
  30. 30.True or false: tamarind water is a base. (a) False (b) True
  31. 31.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) tamarind water
  32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  33. 33.🫧 Is plain water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  34. 34.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) vinegar (c) sugar water (d) lemon juice
  35. 35.🔍 Which is the odd one out? (a) plain water (b) baking soda water (c) detergent water (d) soap solution
  36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) True (b) False
  37. 37.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) soap solution (c) water (d) a magnet
  38. 38.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  39. 39.🫧 Is detergent water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
  40. 40.True or false: sugar water is neutral. (a) False (b) True

Answer key

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

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