Beers Law and Colorimetry Problems

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SUMMARY

This discussion centers on the application of Beer's Law in colorimetry problems, specifically addressing homework questions related to concentration calculations. Participants express confusion regarding the substitution of values and the relevance of logarithmic relationships in the context of the equations. The conversation highlights the necessity of understanding the experimental context and the proper interpretation of variables such as x and y. Overall, the discussion emphasizes the importance of foundational knowledge in chemistry to solve these types of problems effectively.

PREREQUISITES
  • Understanding of Beer's Law and its application in colorimetry.
  • Familiarity with logarithmic functions and their relevance in concentration calculations.
  • Basic knowledge of chemistry laboratory practices and experimental context.
  • Ability to interpret and manipulate equations related to concentration and absorbance.
NEXT STEPS
  • Research the principles of Beer's Law and its mathematical formulation.
  • Learn how to perform concentration calculations using colorimetric data.
  • Study logarithmic functions and their applications in scientific equations.
  • Explore common laboratory techniques for measuring absorbance and concentration in chemistry.
USEFUL FOR

Chemistry students, educators, and laboratory technicians who are involved in colorimetry experiments and require a deeper understanding of Beer's Law and its practical applications.

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Homework Statement


1.http://puu.sh/b88pU/4f28d92240.png
2.http://puu.sh/b88rd/e93d067670.png
3.
73eda5cf2a.png

4.
77c441fdd2.png


Homework Equations





The Attempt at a Solution


1. I substituted x with 1.8 and got .751 then multiplied by 1000 to get 751 ohm but not sure if this process is entirely correct.
2.no idea
3.substituted 650 with y and then got 3.3 x 10^3, again not sure if right
4. no idea
 
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I completely miss any relevant equations...
 
BvU said:
I completely miss any relevant equations...

Thats the thing, Idk what even relates to this.
 
Idk is no good (see forum rules). What dyk ?
Any idea how to google Beer's law? probably yes. Least you can do is make a guess as to how this can be migrated to your exercise.

This screen dump comes from somewhere (and not from a sociology course). So there is a context.
And you must have an idea what x and y are. So be so kind as to include that knowledge under 1.
y must be some logarithm ? you substitute the 1.8 ppm for x. so the .195 is dimensionless too ? No way to get Volts per Ampere that way, right ?

And so on. I like Question 7 also: none of the answers has the dimension of concentration.

Could this be a Chemistry course ? Or am I not making friends that way ?
 
BvU said:
Idk is no good (see forum rules). What dyk ?
Any idea how to google Beer's law? probably yes. Least you can do is make a guess as to how this can be migrated to your exercise.

This screen dump comes from somewhere (and not from a sociology course). So there is a context.
And you must have an idea what x and y are. So be so kind as to include that knowledge under 1.
y must be some logarithm ? you substitute the 1.8 ppm for x. so the .195 is dimensionless too ? No way to get Volts per Ampere that way, right ?

And so on. I like Question 7 also: none of the answers has the dimension of concentration.

Could this be a Chemistry course ? Or am I not making friends that way ?

Sorry yea its a chemistry question.

I put it in the wrong section
 
No problem, Chemistry is physics as soon as you know what you are doing anyway. Now how about some context, etc?
 
BvU said:
No problem, Chemistry is physics as soon as you know what you are doing anyway. Now how about some context, etc?

Its just some basic questions about beers law and a colorimetry lab.
 
Then there is no place for resistance. Either something is completely off, or you are ignoring the context. Our bet is that there was some introduction to these questions, describing what is the experiment.
 

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