Cause and Effect
On campus, Annisa meets Nina in the cafeteria to
inquire about a practicum she can not attend due to illness. Annisa wanted to
ask about what happened when the paper was dipped in water and then given
alcohol and burned.
Annisa:
Hi Nina..
Nina
: Hi Annisa..
Annisa:
May I ask about chemistry lab last week?
Nina
: Oh may nisa, about stoichiometry yes Nis?
Annisa
: Yes nin, when the filter paper is inserted into distilled water and put again
into alcohol 30% what happens with the paper?
Nina
: The paper does not burn, the color of the flame becomes blue. Because the
paper contains water, when the paper is burned it burns not its paper material
but the burn is the alcohol, and the color of the flame becomes blue because
blue is the flame color of alcohol.
Annisa
: Thank you very much Nin, for explanation.
Nina
: Okey Nis, you're welcome.
What is the characteristic of Alcohol?
BalasHapusIn general, the alcohol compound has several properties, as follows:
HapusFlammable
2) Easy to mix with water
3) Phase shapes at room temperature:
- with C 1 to 4 being either gas or liquid
- with C 5 to 9 in the form of a viscous liquid such as oil
- with C 10 or more in the form of a solid
4) Generally, alcohol has a high boiling point compared
Alkananya. This is due to the presence of hydrogen bonds over the molecule.
Why alcohol can burn
BalasHapusBecause alcohol has a great power if it is given the heat of alcohol is directly oxidized with carbon so that alcohol is easily burned
HapusWhy filter paper is put into distilled water and 30% alcohol first ?
BalasHapusBecause want to see the comparison between burning water and alcohol. And water is already wetting paper but water does not evaporate as fast as alcohol
HapusWhat are the uses of alcohol?
BalasHapuspolymer. Methanol is also widely used as a mixture of gasoline and spirtus. As a fuel, methanol has advantages over gasoline, the combustion process can be more perfect, but the cost of production is more expensive.
Hapus2. ETHANOL
The alcohol we call daily is ethanol, with the structure formula C2H5OH. Ethanol is produced by carbohydrate fermentation process, for example cassava fermentation which is often called tape making. The process of changing carbohydrates to ethanol is done with the help of enzymes.
Carbohydrates → C6H12O6 → 2CH3CH2OH + 2CO2 (g) (with the help of enzymes)
Glucose ethanol
This process produces the energy utilized by microorganisms to grow and multiply. The fermentation process can not produce ethanol with high concentrations. This is due to the alcohol concentration of more than 15% then the microorganisms will die. For that, usually the fermentation process is increased alcohol concentration by distillation technique. In the industrial world, ethanol is massively produced with water and ethene additions at a temperature of 280 ° C and a pressure of 300 atmospheres.
CH2 = CH2 + H2O → CH3CH2OH (with H2SO4 catalyst)
Ethene ethanol
Ethanol is widely used as an organic solvent and raw material for industrial compounds such as dyes, synthetic drugs, cosmetic ingredients, explosives, fuels, and alcoholic beverages (wine and beer). Ethanol is not toxic, but in large quantities it will cause a hangover, because ethanol works with brain activity. Another impact of the alcohol working system is the resulting addiction.
3. GLYLOL ETHILEN AND GLYCEROL
The polyalcohols having two -OH groups are named alkanediol, for example 1,2-ethanediol (ethylene glycol), whereas the polyalcohols with the three -OH groups are named alkanatriol, for example 1,2,3-propanatriol (glycerol).
Ethylene glycol or commonly called glycol alone includes aliphatic alcohols with two hydroxyl groups. The term glycol comes from the Greek glykis which means sweet. Ethylene glycol is a colorless, water-soluble, sweet-tasting, boiling point of 198oC and is toxic. Glycols can freeze at low temperatures (-11.5 o C) so that glycol is commonly used as an anti-freeze substance on car radiators. In industry, ethene glycol is used as a paint solvent, a softener, a synthetic fiber industry base material such as Dacron. Ethylene glycol can be obtained by oxidation reaction in ethylene, followed by hydrolysis in acidic atmosphere.
Usefulness of alcohol - ethylene glycol
Glycerol comes from the Greek word glykeros which means sweet. Gilserol, also known as glycerine, is a viscous liquid with 18 oC dot and a boiling point of 290 oC, hygroscopic, and sweet to taste. Glycerol is a by-product of soap making.
Use of alcohol
Glycerol is widely used for the manufacture of cosmetics, solvents for medicine, and lubricants. In addition, glycerol is used as plastic raw material, fiber and glycerol nitration results will produce glyceryl trinitrate (nitroglycerin) used as an explosive.
polymer. Methanol is also widely used as a mixture of gasoline and spirtus. As a fuel, methanol has advantages over gasoline, the combustion process can be more perfect, but the cost of production is more expensive.
Hapus2. ETHANOL
The alcohol we call daily is ethanol, with the structure formula C2H5OH. Ethanol is produced by carbohydrate fermentation process, for example cassava fermentation which is often called tape making. The process of changing carbohydrates to ethanol is done with the help of enzymes.
Carbohydrates → C6H12O6 → 2CH3CH2OH + 2CO2 (g) (with the help of enzymes)
Glucose ethanol
This process produces the energy utilized by microorganisms to grow and multiply. The fermentation process can not produce ethanol with high concentrations. This is due to the alcohol concentration of more than 15% then the microorganisms will die. For that, usually the fermentation process is increased alcohol concentration by distillation technique. In the industrial world, ethanol is massively produced with water and ethene additions at a temperature of 280 ° C and a pressure of 300 atmospheres.
CH2 = CH2 + H2O → CH3CH2OH (with H2SO4 catalyst)
Ethene ethanol
Ethanol is widely used as an organic solvent and raw material for industrial compounds such as dyes, synthetic drugs, cosmetic ingredients, explosives, fuels, and alcoholic beverages (wine and beer). Ethanol is not toxic, but in large quantities it will cause a hangover, because ethanol works with brain activity. Another impact of the alcohol working system is the resulting addiction.
3. GLYLOL ETHILEN AND GLYCEROL
The polyalcohols having two -OH groups are named alkanediol, for example 1,2-ethanediol (ethylene glycol), whereas the polyalcohols with the three -OH groups are named alkanatriol, for example 1,2,3-propanatriol (glycerol).
Ethylene glycol or commonly called glycol alone includes aliphatic alcohols with two hydroxyl groups. The term glycol comes from the Greek glykis which means sweet. Ethylene glycol is a colorless, water-soluble, sweet-tasting, boiling point of 198oC and is toxic. Glycols can freeze at low temperatures (-11.5 o C) so that glycol is commonly used as an anti-freeze substance on car radiators. In industry, ethene glycol is used as a paint solvent, a softener, a synthetic fiber industry base material such as Dacron. Ethylene glycol can be obtained by oxidation reaction in ethylene, followed by hydrolysis in acidic atmosphere.
Usefulness of alcohol - ethylene glycol
Glycerol comes from the Greek word glykeros which means sweet. Gilserol, also known as glycerine, is a viscous liquid with 18 oC dot and a boiling point of 290 oC, hygroscopic, and sweet to taste. Glycerol is a by-product of soap making.
Use of alcohol
Glycerol is widely used for the manufacture of cosmetics, solvents for medicine, and lubricants. In addition, glycerol is used as plastic raw material, fiber and glycerol nitration results will produce glyceryl trinitrate (nitroglycerin) used as an explosive.