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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 427 · 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) plain water (b) sugar water (c) tamarind water (d) baking soda water
  2. 2.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
  3. 3.⚖️ 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
  4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) a balloon (d) soap solution
  5. 5.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) your best clothes (d) a white party dress
  6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) white paper strips (c) a comb (d) turmeric powder
  7. 7.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) it turns blue (d) reddish-brown
  8. 8.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  9. 9.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it disappears (c) it turns darker red (d) it turns yellow again
  10. 10.True or false: curd 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 the one thing we change. (a) True (b) False
  12. 12.True or false: lemon juice keeps turmeric yellow. (a) False (b) True
  13. 13.🟡 Which of these keeps turmeric yellow? (a) lemon juice (b) baking soda water (c) detergent water (d) soap solution
  14. 14.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
  15. 15.🫧 Which of these is an acid? (a) sugar water (b) baking soda water (c) curd (d) soap solution
  16. 16.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
  17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the turmeric paper (d) the liquid we test
  18. 18.🫧 Which of these is neutral? (a) detergent water (b) orange juice (c) plain water (d) vinegar
  19. 19.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) plain water (d) sugar water
  20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
  21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
  23. 23.🫧 Which of these is neutral? (a) vinegar (b) curd (c) sugar water (d) lemon juice
  24. 24.True or false: vinegar is neutral. (a) True (b) False
  25. 25.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) an indicator (d) a magnet
  26. 26.🫧 Which of these is a base? (a) lemon juice (b) orange juice (c) detergent water (d) plain water
  27. 27.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
  28. 28.🛟 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
  29. 29.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) sugar water (c) baking soda water (d) lemon juice
  30. 30.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
  31. 31.True or false: baking soda water is a base. (a) False (b) True
  32. 32.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
  33. 33.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) baking soda water (d) plain water
  34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
  36. 36.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) baking soda water (d) detergent water
  37. 37.True or false: sugar water turns turmeric reddish-brown. (a) False (b) True
  38. 38.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
  39. 39.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
  40. 40.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False

Answer key

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

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