Topic: Calculating the slope of a calibration curve of a voltaic cell...? (Read 11201 times)

o1ocups · « **on:** April 05, 2009, 09:25:38 PM »

A voltaic cell designed to measure [Cu2+] is constructed of a standard hydrogen electrode and a copper metal electrode in the Cu2+ solution of interest.

If you wanted to construct a calibration curve for how the cell potential varies with the concentration of copper(II), what would you plot in order to obtain a straight line? Ans: log[Cu2+] versus E°cell

But what would be the slope of the line?

I changed the Nernst equation around and got 34 but I think it's wrong $:-\$

o1ocups · « **Reply #1 on:** April 05, 2009, 10:34:25 PM »

Someone give me a hint please?

Borek · « **Reply #2 on:** April 06, 2009, 02:56:32 AM »

34 of what?

Show how you got it, hard to help not knowing what and how you did.

o1ocups · « **Reply #3 on:** April 06, 2009, 01:22:35 PM »

Forget what I did, it is completely wrong. The correct answer is 0.0296 V but I have no idea how they got that answer. I thought it might have something to do with changing the Nernst equation around to fit the y=mx+b form but if not I really have no idea where to start.

Borek · « **Reply #4 on:** April 06, 2009, 05:00:11 PM »

This is pretty simple. Write Nernst equation for your cell.

Topic: Calculating the slope of a calibration curve of a voltaic cell...? (Read 11201 times)

o1ocups

Calculating the slope of a calibration curve of a voltaic cell...?

o1ocups

Re: Calculating the slope of a calibration curve of a voltaic cell...?

Borek

Re: Calculating the slope of a calibration curve of a voltaic cell...?

o1ocups

Re: Calculating the slope of a calibration curve of a voltaic cell...?

Borek

Re: Calculating the slope of a calibration curve of a voltaic cell...?

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