Qualification > Sciences
Chemistry Help needed!:-(
guru007:
Pipette is the most accurate of them all and i think a buerette should be needed for measuring ACID and pipette can also be used.
Measuring cylinder is not used as the range is very small.
cockyxrocker:
electrolysis of concentrated sodium chloride using carbon electrodes
the solution also contained litmus solution
What happened to the colour of solution around cathode
Why did this change take place?
If there is hydorgen produced at the cathode
then why would there be a colour change since hydrogen is a neutral gas...shouldnt it stay green?
I dont get it...
twilight:
the solution is concentrated i.e. very less water molecules are present
so it is sodium ions that go to the cathode .. not hydrogen bcoz hydrogen is not abundant enough in the solution
yinyang:
you are wrong twilight in electrolysis the cation which is lower in the reactivity series i.e. hydrogen
concentration only effects which anion goes i.e. chlorine
when chlorine and hydrogen leave sodium hydroxide is left behind which is a base so litmus indicator turns blue.
godfather93:
ur right yinyang!
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version