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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 141 · 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.

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

Answer key

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

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