Kuliah Spektroskopi

Diberitahukan kepada mahasiswa kimia yang mengikuti kuliah kimia analisis spektroskopi, untuk materi UV-VIS (instrumentasi) sebagai bagian materi UTS tanggal 27 November 2008, akan saya sampaikan pada saat kuliah hari selasa tgl 25 November 2008, sebelum materi inframerah dan latihan soal, demikian pemberitahuan ini. Terimakasih

-elokkamilah-

Ralat Tugas Bahan Alam

Tugas kimia bahan alam (hasil ralat) dapat diklik di sini
Tugas dikirimkan Via email ke alamat : elokkamilah@gmail.com
paling lamat tanggal 1 Desember 2008


-elokkamilah-

latihan soal ke-2 Kimia dasar I

Latihan soal ke-2 kimia dasar dapat di klik di sini

Selamat mengerjakan

-elokkamilah-

TUGAS KIMIA BAHAN ALAM

Tugas kimia bahan alam dapat di klik di sini

Tugas dikumpulkan tanggal 1 Desember 2008
Tugas dikirim ke alamat email elokkamilah@gmail.com dengan subject: nama dan topik tugas. Terima kasih

-elokkamilah-

TUGAS KIMIA ANALISIS SPEKTROSKOPI

Tugas kimia analisis spektroskopi, dapat di klik di sini
Tugas ini dikumpulkan pada saat ujia tengah semester (UTS)
terima kasih

-elokkamilah-

Soal-soal UTS KIMDAS I (download)

Soal-soal kimia dasar satu bisa di download di sini

LATIHAN SOAL UJIAN UTS KIMIA DASAR I

Selamat Mengerjakan soal-soal ini. Semoga bermanfaat.

1. The first step in obtaining elemental zinc from its sulfide ore involves heating it in air to obtain the oxide of zinc and sulfur dioxide. (a) Calculate the mass of O₂ required to react with 7.00 g of zinc sulfide. (b) Which is the limiting reactant?. (c) How much sulfur dioxide is produced?

2. Zinc and sulfur react to form zinc sulfide, a substance used in phosphors that coat the inner surfaces of TV picture tubes. In a particular experiment 12.0 g of Zn are mixed with 6.50 g S and allowed to react. (a) Which is the limiting reactant? (b) How many grams of ZnS can be formed from this particular reaction mixture? (c) How many grams of which element will remain unreacted in this experiment?

3. What is the percent composition of chloroform, CHCl₃, a substance once used as an anesthetic?

4. What is the percent composition of ethanol, C₂H₅OH, a substance once used as an antiseptic?

5. Which is Bigger if atom/ionic size? Why?

Na or K ; Na or Mg ; Al or I ‘; Na or K ; Na or Mg ; Al or I ?

6. Which has a higher 1st ionization energy? Why?

Mg or Ca ?; Al or S ?; Cs or Ba ?

7. Which is more electronegative? Why?

F or Cl ?; Na or K ?; Sn or I ?

8. Use a periodic table or use the Pauling electronegativity values to classify each of the following compounds as non-polar covalent, polar covalent, coordination covalent or ionic.

F_2; H₂ ; HF ; O₃; HBr; HCl; NH₃; NaCl; HNO₃ ; NH₄⁺ CaO; MgCl₂; dan NaF

9. Draw Lewis structures of the following.

CCl₄; CH₂O; C₂H₂; CH₃OH; CH₃CHCH₂; HCN; NH₂OH

10. Draw resonance forms for the following.

Indicate whether the resonance forms are equivalent in energy. If not, indicate the major resonance contributor (most stable). Click on the arrow to check your answers.

SCN- CH2N2 CH3CO2-

11. Draw the Lewis structures, give the molecular geometry, and determine whether the following will be polar or non-polar. Click on the arrow to check your answers

CCl4; CHCl3; CH2O; CO2