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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 166 · 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 rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) use only kitchen items (d) sniff each bottle hard
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the colour we see (d) the turmeric paper
  3. 3.🔍 Which is the odd one out? (a) tamarind water (b) baking soda water (c) sugar water (d) plain water
  4. 4.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  5. 5.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  6. 6.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
  7. 7.True or false: orange juice is neutral. (a) True (b) False
  8. 8.🫧 Which of these is neutral? (a) curd (b) sugar water (c) vinegar (d) soap solution
  9. 9.True or false: vinegar is neutral. (a) False (b) True
  10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
  11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a mirror (c) lemon juice (d) turmeric powder
  12. 12.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
  13. 13.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) a comb (d) lemon juice
  14. 14.⚖️ 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
  15. 15.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) detergent water (d) soap solution
  16. 16.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) salt water (c) baking soda water (d) lemon juice
  17. 17.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) water (c) a magnet (d) white paper strips
  18. 18.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  19. 19.🟡 Why does soap solution change turmeric’s colour? (a) soap is magnetic (b) soap water is a base (c) soap is hot (d) soap is an acid
  20. 20.⚖️ 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
  21. 21.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
  23. 23.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your best clothes (c) your school uniform (d) an old shirt or apron
  24. 24.True or false: plain water is an acid. (a) True (b) False
  25. 25.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  26. 26.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  27. 27.🫧 Is soap solution an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  28. 28.🫧 Which of these is an acid? (a) detergent water (b) salt water (c) tamarind water (d) soap solution
  29. 29.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
  30. 30.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) a mirror (c) lemon juice (d) turmeric powder
  31. 31.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
  32. 32.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  34. 34.🔍 Which is the odd one out? (a) plain water (b) detergent water (c) soap solution (d) baking soda water
  35. 35.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) bright blue (d) green
  36. 36.True or false: salt water turns turmeric reddish-brown. (a) False (b) True
  37. 37.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
  38. 38.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns black (c) it stays yellow (d) it turns red
  39. 39.🔍 Which is the odd one out? (a) salt water (b) baking soda water (c) soap solution (d) detergent water
  40. 40.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution

Answer key

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

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