Line versus Comma

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Bijan Mehdizadeh 1B
Posts: 73
Joined: Fri Sep 28, 2018 12:15 am

Line versus Comma

Postby Bijan Mehdizadeh 1B » Sat Feb 23, 2019 8:46 pm

Why do some cell diagrams separate their reactant and product for a half reaction with a vertical line and some separate them with a comma?

Chloe Qiao 4C
Posts: 65
Joined: Fri Sep 28, 2018 12:27 am

Re: Line versus Comma

Postby Chloe Qiao 4C » Sat Feb 23, 2019 9:29 pm

A line indicates that the substance are in different phases (e.g. Cu(s)|Cu2+(aq)), and comma representing two substances in same phase (e.g. Fe3+(aq)|Fe2+(aq)).

Luc Lorain 1L
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Line versus Comma

Postby Luc Lorain 1L » Sat Feb 23, 2019 9:41 pm

It should also be noted that while a single line represents that there is a phase barrier between two species in either the anode or cathode (ex. Cu(s) and Cu(aq)), the double line indicates the salt bridge that is in contact between the anode and cathode. The exact composition of the salt bridge, however, is excluded from the reaction itself.

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