Question
Asked Feb 3, 2020
66 views

For my lab I had to find the unknown concentration of a solution. I found wavelength max of the potassium chromate. Then used that max to find the absorbtion for my sample dilutions. Based on my attached graph. Is my unknown concentration #  making sense? Or did I make an error with the absorbance I wrote down in the lab. I did my calculations when I got home. They are correct, but my unknown concentration amount doesn't look like it will even be on the graph. Or am I wrong. Please  advise and explain. Thank you 

Absorbance
Concentration
slope (m)
2528.2
Intercept (c)
0.0253
0.0002
0.495655377
0.00015
0.45258486
0.0001
Absorbance of unknown sample
0.262383057
0.040399
Concentration of unknown sample
0.00005
0.179808907
5.97223E-06
0.6
y = 2528.2x+ 0.0253
R? = 0.9683
0.5
0.4
0.3
0.2
0.1
0.00005
0.0001
0.00015
0.0002
0.00025
Concentration (M)
Absorbance
help_outline

Image Transcriptionclose

Absorbance Concentration slope (m) 2528.2 Intercept (c) 0.0253 0.0002 0.495655377 0.00015 0.45258486 0.0001 Absorbance of unknown sample 0.262383057 0.040399 Concentration of unknown sample 0.00005 0.179808907 5.97223E-06 0.6 y = 2528.2x+ 0.0253 R? = 0.9683 0.5 0.4 0.3 0.2 0.1 0.00005 0.0001 0.00015 0.0002 0.00025 Concentration (M) Absorbance

fullscreen
check_circle

Expert Answer

star
star
star
star
star
1 Rating
Step 1

The observed unknown sample concentration is not lying on the graph because the concentrations of dilut...

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Science

Chemistry

Quantitative analysis

Related Chemistry Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: Brazilians are quite familiar with fueling their automobiles with ethanol, a fermentation product fr...

A: Thermodynamic is the branch of chemistry that mainly deals with the heat transfer between system and...

question_answer

Q: What does an atom gain or lose when ions are produced? A)protons B)neutrons C)electrons

A: Option (C)

question_answer

Q: How do I solve #3?

A: Click to see the answer

question_answer

Q: Wine goes bad soon after opening because the ethanol CH3CH2OH dissolved in it reacts with oxygen ...

A: It is given that there are 2.3 mol of water.

question_answer

Q: Aluminum metal crystallizes in a face-centered cubic unit cell. a. How many aluminum atoms are in a...

A: Aluminium crystallizes in a fcc unit cell. In fcc, eight atoms are there in eight corner of the unit...

question_answer

Q: If you burn 37.5 g of hydrogen and produce 335 g of water, how much oxygen reacted?

A: The balanced reaction of combustion of hydrogen gas with oxygen present in air to form water is give...

question_answer

Q: llege in I Assignments: Intro Chemist A 14 Measurements Measurements - Chemi: X New tab https://cnx....

A: Click to see the answer

question_answer

Q: What molality of a nonvolatile, nonelectrolyte solute is needed to raise the boiling point of water ...

A: Molality of a non-volatile, non-electrolyte solute that is needed to raise the boiling point of wate...

question_answer

Q: Which of the following is an ionic compound?   (A) (NH4)3PO4 (B) H3PO4 (C) SiCl4 (D) PCl5...

A: Ionic bond is formed by the complete transfer of valence electron(s) between atoms. It is a type of ...