Recent content by tabasko

Hello PF, I'm doing a Mohr's titration to determine Cl concentration. The volume I am working with is small, and it is not possible to obtain more. I have 2 uL of analyte to which I add 1 uL of indicator. Then, I add AgNO3 1 uL (0.014M) at a time until the endpoint is reached (color...

Hey Studiot, I went through the link and the Wenner array method seems to be exactly what I am talking about when I mentionned the tetrapolar measurement. Now I just need to find a suitable power supply and the other required instruments.

Hello all, For my project, I am trying to measure the solute concentration of water inside a porous ceramic plate (~2mm in diameter). I am using platinum electrodes. There are two ways I think I could possibly do this. 1) Place two electrodes on the sides of the porous disk 2) Place 4...

The resistance we are trying to measure is unknown, so we just want to find the resistance at room temperature. Once again I am positive that the temperature is not changing. Enough to account for that difference. What were the resistances you were measuring? I measured several resistors...

we definitely thought of the temperatures but I have the temperature coefficient for the resistor (it's actually a piece of alloy 20) I'm measuring, and the decreases would correspond to more than 100C of cooling down (since resistance is supposed to increase with temperature) I put a...

Hi, I am using a Wheatstone bridge to measure very low resistances (around 0,2ohms) and my measurements are changing from day to day. If I take the resistance measurement of the same resistor several times, I notice that each measurement will be lower than the next. But the next day, the...

Those values are for liquids, and in my problem, we have a gas!

I need to find the fugacity of freon-12 (Dichlorodifluoromethane) at 82.2C and 9.65bar, using a method that does not require critical data. I'm assuming we can find any other information to solve the problem, but I not sure where to start..