;I don’t believe
that the “Error-Bars
” will be very helpful, because:
.. differences in light intensity by less than 1%.
- is not very linear to Absorptions, but Absorptions is “very” linear to Concentrations!
That means that the “’1.0 %’ -Error-Bars” will have a different size
over de whole Absorptions scale.
As the second
Using the above data, calculate the minimal concentration .
- it is required to solve prior
the first Question, otherwise you will not have any Concentration result!
To solve the 1.
Question you best “see” the Spectrometer as only a little special Indicator!
- - So, at how much mL’s your “Indicator” has changed its color?
- - And the remaining you can handle as a normal “…….”-Titration: It’s Stoichiometry!
Then to solve the 2.
Question you need the Mrs. “Beer and Lambert
”, because you will have to translate:
- - Your Concentration and corresp. Absorption you have read from the Graph into an of εtotal!
- - 1.0% Transmittance into its corresponding Absorption (A1.0%).
- - Finally you can translate your A1.0% with the help of εtotal into a Concentration.
Mrs. “Beer and Lambert
” with Graphs, Formulas, and Explanations you can find on:
I hope this gives you enough help to start your both Solutions.
For Stoichiometry the following page may be of some help: "Stoichiometry Problem