can someone please explain to me in dummy language this question... Why is the graph of transmittance versus concentration not linear?...
Thankyou very much
I suppose the easiest way to look at that absorbance = A = abc and that is a linear graph. But A = log (1/T) so the graph of T versus concn can't be linear because it is a log term.
In dummy language, it is not linear because it is logarithmic by definition.
absorbance=constant*concentration=kc
which is linear with concentration.
but absorbance=10*log P/Po=
=10log 1/Transmittance
because transmittance=P/Po
which leads to T=e-k*concentration
Thus, it is not linear.
http://teaching.shu.ac.uk/hwb/chemistry/tutorials/molspec/beers1.htm
why is the hydrous copper sulfate heated to constant weight?
Certainly! To understand why the graph of transmittance versus concentration is not linear, let's break it down step by step.
1. Transmittance: Transmittance refers to the amount of light or energy that can pass through a substance. In other words, it measures how much light is transmitted through a sample.
2. Concentration: Concentration refers to the amount of a certain substance that is present in a given quantity of a mixture or solution.
Now, let's consider why the graph of transmittance versus concentration is not linear:
1. Absorption: When light passes through a substance, it can be absorbed by the molecules present in that substance. These molecules have certain properties that determine whether they absorb or transmit light.
2. Relationship between transmittance and concentration: In some cases, as the concentration of a substance increases, so does the absorption of light. This means that less light is transmitted through the substance, resulting in lower transmittance. As a result, the graph of transmittance versus concentration may show a decrease in transmittance as the concentration increases.
3. Nonlinear behavior: The relationship between transmittance and concentration is typically not linear because absorption is often not directly proportional to concentration. Instead, it frequently follows more complex patterns, such as exponential decay or saturation. This is due to factors like molecular interactions, solute-solute interactions, solvent effects, and other chemical properties of the substance.
To summarize, the graph of transmittance versus concentration is not linear because the absorption of light by molecules in a substance does not increase linearly with concentration. Instead, it follows more complex patterns determined by various chemical factors.