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Results tagged with titration
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user 16622
A laboratory method to determine the concentration of an analyte in solution. The solution volume plays a key role in the analysis.
6
votes
Accepted
Phosphoric Acid Titration
But in case you don't, one of my answers here on chem.se covers the calculation of titration curves with and without increasing volume. … It is quite easy to create a titration curve using an adapted (see exact solution for triprotic acids here) version of equation 8. …
2
votes
Accepted
Calculating molecular weight of an acid based on titration data
This means for your titration, that you need one base equivalent to reach the first equivalent point (EP) and two base equivalents to reach the second EP. …
6
votes
Accepted
EDTA Titrations
I posted the general solution for the degree of dissociation here:
$$\ce{\alpha(H_{n-m}A^{m-})} = \frac{x^{n-m} \prod_{j=1}^{m}k_{j}}{\sum_{i=0}^{n}x^{n-i} \prod_{j=1}^i k_{j}}$$
with $x = [\ce{H+}]$, …
9
votes
Accepted
How to analyze a acid and salt mixture using titrimetry?
Prologue
The following will show you not only how to sketch a titration curve but how to produce an analytical form of a titration curve. … What is likewise to be seen, is that one can neglect this third deprotonation step in titration curves of diluted solutions (yellow vs. blue titration curve). …
10
votes
Accepted
Why is a theoretical titration curve higher than a practical one?
This means for your titration, that you are not only titrating your acid anymore but you are also titrating the dissolved $\ce{CO2}$. … You can determine the equlibrium point of the $\ce{HCl}$-titration (though it's not around pH 7 but at pH 4-5) no matter how many hydrogen carbonate will be formed during your titration. …
2
votes
Titration of H3PO4 and H2SO4 with methyl orange and phenolphtalein as indicators
I for myself like to watch titration curves, because they often give hints about where to look. … With those thoughts in mind, the question can also be answered without my fancy titration curves. …
4
votes
Concentration of a species outside buffer region (polyprotic acid titration)
At the one side, you can always calculate the percentages of the acid or it's ions in solution:
$$\ce{\alpha(H_{n-m}A^{m-})} = \frac{x^{n-m} \prod_{j=1}^{m}k_{a,j}}{\sum_{i=0}^{n}x^{n-i} \prod_{j=1}^i …
4
votes
Accepted
Getting the wrong pH value, according to data and online calculator
As you can see from the point that $n_\ce{OH} > n_\ce{AcOH}$, there will be an excess of hydroxide ions. What you want to calculate is the pH for this amount of hydroxide ions within the total volume …
4
votes
Accepted
Titration of H3PO4 with NaOH
The answer to your question does not need a single calculation.
You have got your 1 molar phosphoric acid that will get deprotonized by the 1 molar sodium hydroxide solution that is added. As both so …