I am on OCR salters for chemistry,and I chose this investigation myself becasue I thought it would be interesting,but it turns out quite confusing. Unfortunately I don't have any notes or whatsoever, all the things I know is from internet.
I am currently doing the analysis for a [strong acid weak alkali] and a [weak acid strong alkali]conductimetric titration, can you give me some hints? I have just dug out my university chemistry textbook Physical Chemistry written by Peter Atkins, in case you want to reference it. He doesn't use the word conductance in this book at all but see later. I will paraphrase some bits of his book. This is done in a conductivity cell. The resistance of a sample increases with its length and decreases with its cross-sectional area:.
This is difficult to measure accurately and so it is usual to standardise the conductivity cell with a known solution often potassium chloride. C is called the cell constant. Because the conductivity of a solution depends on the concentration of the ions, it is a good idea to calculate the molar conductivity.
Strong electrolytes include the strong acid and strong alkali in this category are totally ionised and weak electrolytes like the weak acid are only partially ionised.
Because the weak acid is only partially dissociated, it has only very few ions in the solution and so its conductivity is much less than for a strong acid. Here is the "later bit". In another book Atkins again but working with Julio de Paula this time conductance is defined as being the inverse of the resistance.
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