Preparation of Chlorine gas
Industrial Preparation of Chlorine Gas
Chlorine is manufactured by the electrolysis of brine, or aqueous sodium chloride. When sodium hydroxide is poured into the cell, chlorine is attracted to the anode and the gas is led out through the top of the cell. H+ is attracted to the cathode and hydrogen gas is led out through the cathode. Na+ is also attracted to the cathode, so NaOH formed from that are disposed of with remaining sodium chloride.
Lab Preparation of Chlorine Gas
Chlorine can be prepared in the lab by reacting concentrated hydrochloric acid with manganese dioxide. An oxidation-reduction reaction takes place and manganese chloride, water, and chlorine gas are produced. The chlorine gas can be collected with upward displacement.
Testing for Chlorine Gas
If damp blue litmus paper turn red and bleaches white, chlorine gas is present. It can also be recognized from its sharp smell.
Chlorine is manufactured by the electrolysis of brine, or aqueous sodium chloride. When sodium hydroxide is poured into the cell, chlorine is attracted to the anode and the gas is led out through the top of the cell. H+ is attracted to the cathode and hydrogen gas is led out through the cathode. Na+ is also attracted to the cathode, so NaOH formed from that are disposed of with remaining sodium chloride.
Lab Preparation of Chlorine Gas
Chlorine can be prepared in the lab by reacting concentrated hydrochloric acid with manganese dioxide. An oxidation-reduction reaction takes place and manganese chloride, water, and chlorine gas are produced. The chlorine gas can be collected with upward displacement.
Testing for Chlorine Gas
If damp blue litmus paper turn red and bleaches white, chlorine gas is present. It can also be recognized from its sharp smell.
Special properties of fluorine
- Fluorine has 7 valence electrons and the shortest atomic radius in the halogen group and is highly reactive
- Fluorine is the most electronegative element with a electronegativity of about 3.98
- It can form a stronger bond with carbon than hydrogen can.
http://www.mindset.co.za/resources//0000023166/0000030201/0000030141/default.htm
Chemistry The Study of Matter Prentice Hall p. 685http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel_pre_2011/chemicalreactions/preparinggasesrev4.shtml
http://crab.rutgers.edu/~alroche/FCh2.pdf
Chemistry The Study of Matter Prentice Hall p. 685http://www.bbc.co.uk/schools/gcsebitesize/science/edexcel_pre_2011/chemicalreactions/preparinggasesrev4.shtml
http://crab.rutgers.edu/~alroche/FCh2.pdf