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Beer's law is no longer valid.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.
Answer:
A beach forms when waves store sand and rock along the shoreline. A few sea shores are comprised of rocks and stones. After some time, they are moved around smooth by the waves.
Explanation:
A beach is a geologic arrangement that is situated along a huge waterway, including lakes, streams, and seas. Sea shores are described by the presence of small bits of natural silt. The dregs might be made out of sand, rock, shell, green growth, or stones. Normal sea shores may take a large number of years to advance, a cycle that is the consequence of continually moving water that disintegrates the land situated around its edge. Basically, rocks or coral reefs situated off the shore are worn out by moving waves. Moreover, streams and rainwaters may dissolve rocks found further inland. These dregs are stored along the coastline, framing a sea shore.
Answer:
capable of being hammered out thin, as certain metals; malleable.
Explanation:
Answer:
Explanation:
pH= 7 is neutral, pH<7 - acidic solutions,
pH>7 - basic solution.
The more value of pH, the more basic solution is.
So, the solution with pH = 12 is more basic.