1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
olga2289 [7]
3 years ago
5

During a spectrophotometric analysis of an unknown, you measure your solution's absorbance, and the value is higher than the hig

hest standard you used to make your standard curve. What should you do to make sure you can use your standard curve to determine the unknown's concertration?
A) Dilute the unknown so that it will have an absorbance within the standard curve. Once the diluted unknown concentration is determined, the full strength concentration can be calculated if the dilution process is recorded. Beer's law only applies to dilute solutions, so diluting the unknown is better than making new standards.B) A new set of standard solutions should be made to accommodate the unknown solution concentration. Beer's law is linear even at high concentrations, but a new concentration curve should be made to illustrate this point. Even though it is more work, making new standard solutions is a better method of obtaining correct results.C) There is no need to do anything to the unknown solution. Beer's law describes the relationship between absorbance and concentration. This relationship is linear even at high concentrations, so the standard curve equation will apply for any concentration of that specific solution.D) Pour a specified amount of the unknown solution into each of the standard curve solutions. This process will increase the absorbance of the solutions, to the point that the unknown solution's absorbance will fit within the standard curve appropriately.
Chemistry
1 answer:
Reil [10]3 years ago
7 0

Answer:

A) Dilute the unknown so that it will have an absorbance within the standard curve. Once the diluted unknown concentration is determined, the full strength concentration can be calculated if the dilution process is recorded. Beer's law only applies to dilute solutions, so diluting the unknown is better than making new standards.

Explanation:

Beer's law states that <em>absorbance is proportional to the concentrations of the absorbing species</em>. This is verified in the case of diluted solutions (0≤0.01 M) of most substances. <u>As a solution gets more concentrated, solute molecules interact between themselves because of their proximity. </u>When a molecule interacts with another, the change in their electric properties (including absorbance) is probable. That's why <u>the plot of absorbance versus concentration stops being a straight line</u>, and <u>Beer's law is no longer valid.</u>

Therefore, if the absorbance value is higher than the highest standard,  dilutions should be made. Once this concentration is determined, the full strength concentration can be calculated with the inverse of the dilution.

You might be interested in
Explain why this reaction can be classified as a synthesis reaction
rusak2 [61]
The reason why the reaction written on the picture can be classified as a synthesis reaction is :
the reaction shows one compound that formed from two compounds 

hope this helps
5 0
3 years ago
Please help me with this I need this now
vodka [1.7K]

Answer:

C.

Explanation:

We get it from the food we eat by mixing it with fluids. Also, you can always look up the answer.

Hope this helps! :) Plz mark as brainliest!

7 0
2 years ago
Read 2 more answers
What body part is the metric system based upon? <br> legs <br> arms <br> fingers<br> feet
8_murik_8 [283]

Answer:

arms

Explanation:

because arms can be metric system of our body

3 0
2 years ago
Read 2 more answers
Iodine-131 half life 8.040 how long will it take for a 40 gram sample of iodine-131 to decay to 0.75 grams
otez555 [7]

Answer:

See explanation below

Explanation:

To get this, we need to apply the general expression for half life decay:

N = N₀e(-λt)    (1)

Where:

N and N₀ would be the final and innitial quantities, in this case, masses.

t: time required to decay

λ: factor related to half life

From the above expression we need λ and t. To get λ we use the following expression:

λ = t₁₂/ln2   (2)

And we have the value of half life, so, replacing we have:

λ = 8.04 / ln2 = 11.6

Now, we can replace in (1) and then, solve for t:

0.75 = 40 exp(-11.6t)

0.75 / 40 = exp(-11.6t)

ln(0.01875) = -11.6t

-3.9766 = -11.6t

t = -3.9766 / -11.6

<h2>t = 0.34 days</h2><h2></h2>
3 0
3 years ago
Different substances have....
Sergio039 [100]

Answer:

Different properties

Explanation:

They are different.

8 0
2 years ago
Other questions:
  • How calculate how many milliliters of glycerin (specific gravity=1.26) will have a mass of 0.75 lbs?
    11·1 answer
  • The equal areas law is Keplers 2nd law of motion of planetary motion. It states that _____
    11·2 answers
  • Given that Avogadro's number is 6.02 X 1023. Calculate the number of molecules present in 100.0moles of
    11·1 answer
  • How much heat is required to raise the temperature of 179g of acetic acid, CH3COOH, from 250C to 82.70C?
    5·1 answer
  • Calculate the molarity of a 10.0% (by mass) aqueous solution of hydrochloric acid.
    9·1 answer
  • What causes normal red blood cells to shrink
    6·2 answers
  • hydrogen sulphide and water molecules have the same shape. however the bond angle in water is greater than the bond angle in hyd
    6·1 answer
  • The average monthly temperatures for January, April, July, and October in Baltimore, Maryland are graphed below. These averages
    10·1 answer
  • Write a nuclear equation for the beta decay of Promethium-165
    14·1 answer
  • Determine the name and formula of a hydrate with the following composition; 32.30%
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!