instrument composition
-Electric furnace
Temperature range:
25°C~1500°C
Heat speed :
Maximum 200°C/min
*Separate Electric furnace and other system like Electronic scale
-Because Electric furnace temperature is very high
so we need to protect other system.
instrument composition
-Electric furnace
Temperature range:
25°C~1500°C
Heat speed :
Maximum 200°C/min
*N
Theory
침전 (Precipitation)
액상 중의 특정 성분이 고체상으로 석출되는 현상
- 농축 · 가열 · 냉각에 의한 석출
- 침전제의 의한 석출
- 포화에 의한 석출
물질의 분리 정제 및 분석 등에 사용
원리: 용해도곱의 원리
→ 물이나 다른 용매에 잘 녹지않는 성질의 물질이 용
This experiment is to find out how to change the shape and size of precipitant by varying the concentration of solution and the precipitation method
1. Heterogeneous precipitation
Prepare
1M Na2CO3
1M CaCl2
Homogeneous Precipitation
Prepare
Urea
1M CaCl2
0.1M CaCl2
중략
Errors
1. No Microscope
2. Didn't close the cap immediately
3. Inaccurate scale of flasks
and low dissolution rate to avoid precipitation of metal
Electrolyte :
lithium potassium carbonate
lithium sodium carbonate
Advantage :
no expensive electro-catalyst
CO can be fuel
waste heat allows the use of a bottoming cycle
Disadvantage :
very corrosive and mobile electrolyte
required CO2
high contact resistances and cathode resistance limit power density