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Topic: Electrical Conductivity Check  (Read 3561 times)

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Offline crichtonracing

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Electrical Conductivity Check
« on: May 04, 2009, 07:56:49 PM »
What do you guys think, is this right from highest to lowest:

Ca(OH)2 - high
KNO3 - low
C6H12O6 - None

Offline Arkcon

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Re: Electrical Conductivity Check
« Reply #1 on: May 04, 2009, 08:05:48 PM »
Why?  Why did you order them as you did?  And is there some other info missing?
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline crichtonracing

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Re: Electrical Conductivity Check
« Reply #2 on: May 04, 2009, 09:20:49 PM »
Physical description   Electrical conductivity of solution   Effect on litmus paper
Colourless solution                High                                         No change
White crystals                None                                         Red to blue
Colourless solution                Low                                         No change

Offline crichtonracing

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Re: Electrical Conductivity Check
« Reply #3 on: May 07, 2009, 10:23:26 AM »
Sorry, I didn't want to start a new post.  Could someone please check my answer to see if it's correct. Here's the question:

2 half-cells in a galvanic cell consist of one iron (Fe) electrode in a solution of iron (II) sulphate (FeSO4) and a silver (Ag) electrode in a silver nitrate solution. Assumimg that the cell is operating as a galvanic cell, State the: oxidation half-reaction, reduction half-reaction, and the overall cell reaction. Remember to eliminate any spectator ions. Describe what will happen to the mass of the cathode and the mass of the anode while the cell is operating.
Fe = Fe^(+2) + 2e-
Ag^(+2) + 2e- = Ag
Fe + Ag^(+2) = Fe^(+2) + Ag
The mass of the Anode decreases as the reacting material becomes aqueous. The mass of the cathode increases as aqueous ions turn into a solid.

Offline crichtonracing

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Re: Electrical Conductivity Check
« Reply #4 on: May 12, 2009, 12:55:03 AM »
I know you guys don't like *Ignore me, I am impatient*'s but can someone please check my work. I have to hand it in tomorrow.

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