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★ page 1: 1Kismet
I've got the 1K spirit, Up in my head, Deep in my heart, All over me to stay.
1k chairman // 1k chairwoman :
Hong Kai // Qian Lin
1k-ians
1// Agnes Tan Xin Yu
2// Chai Ke Xin
3// Chiang Yi Zhen Rebecca
4// Chin Sze Wei, Amanda
5// Chua Wen Ting
6// Claire Lim Fen Hui
7// Gan Ru Wen Cheryl
8// Guo Li
9// Kong Ying Xuan
10// Leong Kai Lin
11// Leow Si Lei
12// Ng Lei Yong
13// Ong Jia Hui
14// Phua Jia Jun
15// Phyllis Ng Su Zhen
16// Tan Hui Lin Janice
17// Teo Wen Xi Crystalene
18// Zhang Qian Lin
19// Zhou Nan
20// Alvin Beak Kang Qi
21// Koh Hong Kai
22// Lee Shyh Haur
23// Lee Zhao Liang
24// Li Zihan
25// Loh Yukang
26// Loo Zong Hua
27// Ong Jing Xiang, Dickson
28// Qu Wen Rui
29// Shi Zheng
30// Tan Meng Hong, Edwin
31// Matthew Wong Yang Jie
Thursday, September 23, 2010
Chem notes pt 2 haha lol :D @ 7:13 PM
Yo ppl, haha here is the 2nd set of ntes.... Solutions & Suspensions... & Separating Techniques... so, nt to waste anymore time.. lets begin...
ok, b4 i begin... I wanna wish every1 taking jap oral tmr... JIAYOUS!!!!!!!! haha lol. Jiayous ok?? Lets work together to achieve the best results possible...
Separating Techniques
-Done using filter funnel, insoluble solid particles that are larger than pore size of filter paper & become residue
-Liquid that pass through filter paper & become filtrate
- Limitation: Slow due to clogged pores
Unable to separate fine particles like bacteria
- But less effective than filtration
- E.g. used to separate clay particles in water or blood cells in plasma
-In a centrifuge, a motor causes it to spin at high speeds, where solids are collected at the bottom and liquid can be decanted off
- evaporate all the solvent away by heat
- CANNOT BE USED for solutes that are easily damaged/decompose when heating (E.g. sugar)
-Used only if: crystals decompose when heated to dryness
for compounds whose solubilitys vary greatly with temp.
- Size of crystal depends on cooling speed
- solution is heated to boil, vapour pass through a LIEBIG (lol big lie) condenser, where its condensed into a liquid. (DUH...)
- liquid collected= distillate
- LIEBIG condenser
--> cooling water must enter outer jacket of condenser from bottom and circulate out through the top, so that:
a) entire jacket filled with water
b) coldest part is be4 vapour escape, ensure no vapour escapes back.
- fractioning column used to ensure that components with diff. boiling points leave at diff. times
- longer time needed
- major uses of fractional distillation- refining crude oil
- nitrogen & oxygen from liquid air
- so, it can separate one substance that sublimes, another that doesn't.
Oshit, gtg. errm, i will continue the ntes in a new part very soon...... sry........
the next part will contain ntes on paper chromatography and solutions and suspensions.. SORRY PEOPLE....
ok, b4 i begin... I wanna wish every1 taking jap oral tmr... JIAYOUS!!!!!!!! haha lol. Jiayous ok?? Lets work together to achieve the best results possible...
Separating Techniques
- Filtration
-Done using filter funnel, insoluble solid particles that are larger than pore size of filter paper & become residue
-Liquid that pass through filter paper & become filtrate
- Limitation: Slow due to clogged pores
Unable to separate fine particles like bacteria
- Decanting
- But less effective than filtration
- Centrifuging
- E.g. used to separate clay particles in water or blood cells in plasma
-In a centrifuge, a motor causes it to spin at high speeds, where solids are collected at the bottom and liquid can be decanted off
- Evaporation to Dryness
- evaporate all the solvent away by heat
- CANNOT BE USED for solutes that are easily damaged/decompose when heating (E.g. sugar)
- Crystallisation
-Used only if: crystals decompose when heated to dryness
for compounds whose solubilitys vary greatly with temp.
- Size of crystal depends on cooling speed
- Simple Distillation
- solution is heated to boil, vapour pass through a LIEBIG (lol big lie) condenser, where its condensed into a liquid. (DUH...)
- liquid collected= distillate
- LIEBIG condenser
--> cooling water must enter outer jacket of condenser from bottom and circulate out through the top, so that:
a) entire jacket filled with water
b) coldest part is be4 vapour escape, ensure no vapour escapes back.
- Fractional Distillation
- fractioning column used to ensure that components with diff. boiling points leave at diff. times
- longer time needed
- major uses of fractional distillation- refining crude oil
- nitrogen & oxygen from liquid air
- Separating Funnel
- Sublimation
- so, it can separate one substance that sublimes, another that doesn't.
Oshit, gtg. errm, i will continue the ntes in a new part very soon...... sry........
the next part will contain ntes on paper chromatography and solutions and suspensions.. SORRY PEOPLE....