November 29, 2015

Homework Help: chemistry 12 lab

Posted by cel on Friday, November 5, 2010 at 11:47pm.

We did a lab on equilibrium and this is one of the following questions:

When Ag ions are added to FeSCN ions (which are red in colour), the colour disappears, and a white precipitate of AgSCN forms.

The question is.. Explain why Fe can be used as an indicator in a reaction to determine the concentration of an unknown solution of Ag by reaction it with a solution of KSCN of known concentration.

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