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Thanks a lot.

Green Education through Eco Chemistry

"Green Education" bertujuan untuk melancarkan peningkatan kualitas pendidikan bangsa melalui penerapan "Eco Chemistry", yaitu pembelajaran yang dilakukan dengan memanfaatkan segala sesuatu yang alami, ramah lingkungan, sehat, praktis dan ekonomis. Pembelajaran ini memerlukan motivasi diri, internal maupun eksternal dan kepedulian terhadap lingkungan hidup.

Ide ini muncul sejak dicanangkannya tahun 2011 sebagai Tahun Internasional Kimia yang bertepatan dengan peringatan 100 tahun Marie Curie menerima hadiah nobel sebagai ilmuwan kimia wanita pertama. Sedang pemikiran dasar terungkapnya ide ini disebabkan oleh masalah dunia yang sangat memerlukan perhatian, yaitu "Green House Effect" dan "Global Warming." Tindakan ini merupakan salah satu wujud partisipasi aktif penulis terhadap pelaksanaan program wajib belajar 12 tahun dan "Surabaya Eco School."

Penulis mengajak pembaca untuk menerapkan "Green Education" melalui "Eco Chemistry" dalam kehidupan sehari-hari. "Green Education" berlangsung seumur hidup (Long life Education), sejak janin dalam kandungan ibu hingga akan masuk ke liang kubur. Marilah dengan niat dan tekad yang kuat kita tingkatkan terus pendidikan diantara kita, terutama anak bangsa sebagai generasi penerus. Pendidikan ini dapat berlangsung Dimana saja dan Kapan saja.

Contoh penerapan "Eco Chemistry" dalam pembelajaran di SMA Negeri 16 Surabaya secara bertahap penulis terbitkan dalam bentuk artikel. Pembelajaran "Eco Chemistry" yang dimulai di sekolah, terus dilanjutkan secara bertahap ke masyarakat. Diharapkan melalui terobosan baru ini, yaitu penerapan "Eco Chemistry", masyarakat memahami dan menyadari bahwa kimia sangat berperan dalam kehidupan dan masa depan bangsa. Hal ini sesuai dengan slogan "International Year of Chemistry 2011" (IYC 2011), yaitu Chemistry: Our Life and Our Future" yang telah ditetapkan oleh PBB melalui UNESCO. Insya Allah tujuan pendidikan ini dapat tercapai secara optimal.


Web Blog Sejuta Guru Indonesia

Para Pengunjung yang saya cintai,
Ini adalah Blog lamaku yang hingga saat ini digunakan oleh banyak guru, siswa, dan pihak lain yang memerlukan.

Saya juga memiliki Blog Baru lagi yang isinya mulai banyak dan artikel-artikelnya banyak yang berasal dari pertanyaan pengunjung dan permintaan artikel khusus.

Saya akan berupaya untuk mempublish artikel-artikel baru di kedua Blog ini, termasuk blog-blog saya yang lain. Insya Allah tiap hari saya tetap dapat meluangkan waktu untuk menulis artikel, baik tentang kimia, pendidikan seumur hidup, Eco School, kesehatan, dan artikel lainnya.

Semoga kebiasaan menulis ini tak pudar oleh apapun, walau memasuki usia senja. Berbuat yang terbaik untuk anak bangsa begitu indah, marilah bersama cerdaskan bangsa.

Terima kasih

Silakan Berkunjung di http://etnarufiati.guru-indonesia.net

Friday, 1 May 2009

COLLOID PROBLEMS

1. Explain the meaning of solvent, solute, filtrate, and precipitate

2. Explain the following terminologies: distillation, filtration, sedimentation, precipitation, and crystallization.

3. What makes water such a good solvent?

4. Classify the following mixtures: sugar and water, sand and water, milk, creamer, and oil

5. How do concentrated solutions differ from dilute solutions?

6. What happens when more solute is added to a saturated solution?

7. What is the size of particles in a solution?

8. What is a colloid?

9. What is one property of a suspension that is different from that of a solution or a colloid?

10. How is a colloid different than a suspension?

11. Which of the following statements about suspensions is correct?

12. Classify the following colloids according to dispersed phase and its medium: foam; cream, milk, paint, gelatine, hair spray, fog, mayonnaise, smoke, emulsion, and butter.

13. Give the type of colloids based on the dispersing medium and the dispersed substance below and give an example of each.
a. liquid – solid
b. gas – liquid
c. solid – liquid
d. solid – gas
e. liquid – gas

14. Give an example of emulsion in the daily life and explain how two make it. Explain the meaning of emulgator and give the reason why is it important in making emulsion.

15. Oil floats on water. Explain the most accurate reason for this.

16. Soap can be used as an emulgator. Explain and draw the interaction between the particles of soap, oil, and water.

17. Explain the following properties of colloid : Tyndall effect; Brown motion; electrophoresis; dialysis; electrodialysis; adsorption; and coagulation.

18. Colloid has a charge which can be positive or negative. Explain the reason.

19. Colloid can be stable and unstable. Give the reason.

20. How do we know the charge of colloid? Explain by giving an example.

30. How do we remove the excess of electrolytes in a colloid?

31. How do we purify a colloid? Is it the same as no. (30) above?

32. What is semipermeable membrane? What is it for?

33. Do you know cotrell tool? What is it for?

34. There are more than one method we use to coagulate a colloid. Which electrolyte can be used to coagulate a colloid that has a negative charge fastly? Which electrolyte can be used to coagulate a positive colloid fastly?

35. Explain the formation of “Delta” in the river.

36. What happen when two colloids that have different charge mix together.

37. There is an unstable colloid which need to be covered with other colloid. Explain and give an example.

38. What are the difference between liofil and liofob? Which one is more stable than the other one?

39. Explain about sulfur sol in water. Is it hydrofil or hydrofob?

40. What is gelatine? Explain please.

41. Vitamine D is a nonpolar vitamine. Is it soluble in water? Explain.

42. Colloid can be made by dispersion or condensation. Explain the difference.

43. How do we make the following colloid? Please explain.
a. gold sol from solid
b. paint from solid
c. AgCl sol from solution
d. sulfur sol from SO2 gas
e. Al(OH)3 sol from Al(OH)3 solid.
f. Fe(OH)3 from solution.
g. AgCl from solid.
h. As2S3 sol from As2O3(aq)

44. Tawas can be used for cleaning water. Explain please.

45. Poison in a certain fish can be removed by using a colloid. Explain please.
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