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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 241 · 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.True or false: detergent water turns turmeric reddish-brown. (a) False (b) True
  2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the colour we see (c) the light we look in (d) the liquid we test
  3. 3.🫧 Which of these is neutral? (a) plain water (b) soap solution (c) lemon juice (d) detergent water
  4. 4.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) sugar water
  5. 5.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sip each liquid (c) mix bathroom cleaners (d) sniff each bottle hard
  6. 6.🫧 Which of these is neutral? (a) curd (b) detergent water (c) baking soda water (d) sugar water
  7. 7.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) an indicator (c) a magnet (d) a pulley
  8. 8.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
  9. 9.True or false: plain water is an acid. (a) False (b) True
  10. 10.⚖️ 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
  11. 11.True or false: tamarind water is an acid. (a) False (b) True
  12. 12.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) water (c) a magnet (d) white paper strips
  13. 13.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
  14. 14.True or false: plain water is a base. (a) False (b) True
  15. 15.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  16. 16.True or false: white paper strips is needed for the turmeric test. (a) True (b) False
  17. 17.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
  18. 18.🔍 Which is the odd one out? (a) detergent water (b) sugar water (c) soap solution (d) baking soda water
  19. 19.True or false: lemon juice is neutral. (a) False (b) True
  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.🟡 Which of these keeps turmeric yellow? (a) salt water (b) detergent water (c) baking soda water (d) soap solution
  22. 22.⚖️ 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
  23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) False (b) True
  24. 24.True or false: salt water keeps turmeric yellow. (a) True (b) False
  25. 25.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) vinegar (d) baking soda water
  26. 26.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) lemon juice
  27. 27.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) it stays white (c) green (d) reddish-brown
  28. 28.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) soap solution (d) salt water
  29. 29.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
  30. 30.⚖️ 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
  31. 31.🫧 Is curd an acid, a base or neutral? (a) a base (b) an acid (c) neutral
  32. 32.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
  33. 33.True or false: tamarind water is neutral. (a) True (b) False
  34. 34.🫧 Which of these is an acid? (a) detergent water (b) curd (c) soap solution (d) baking soda water
  35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
  36. 36.🫧 Which of these is an acid? (a) sugar water (b) lemon juice (c) salt water (d) baking soda water
  37. 37.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it disappears (d) it turns yellow again
  38. 38.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) detergent water (c) tamarind water (d) soap solution
  39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the light we look in (c) the number of drops (d) the turmeric paper
  40. 40.True or false: vinegar keeps turmeric yellow. (a) False (b) True

Answer key

  1. True
  2. the liquid we test
  3. plain water
  4. sugar water
  5. use only kitchen items
  6. sugar water
  7. an indicator
  8. False
  9. False
  10. we keep it the same
  11. True
  12. a magnet
  13. True
  14. False
  15. an acid
  16. True
  17. needed
  18. sugar water
  19. False
  20. we keep it the same
  21. salt water
  22. we keep it the same
  23. True
  24. True
  25. vinegar
  26. lemon juice
  27. reddish-brown
  28. soap solution
  29. stays yellow
  30. True
  31. an acid
  32. False
  33. False
  34. curd
  35. we measure it
  36. lemon juice
  37. it turns yellow again
  38. tamarind water
  39. the colour we see
  40. True

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