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Utilizing the Beer-Lamber Law you have A=abc
here A= is the absorbance at a set wavelength
a= the molar absorbtivity
b= the path length
c= concentration in molar
The best way to determine a is to make solutions of known concentrations of cobalt nitrate (3-5 would be best) and determine the absorbance of each solution.
Next plot the Abs vs concentration of each solution using something like excel or R. Determine the line of best fit ( it's important to force fit this line through 0) the R-sqr value should be no less than .95
Since the equation of a line is : y=mx +b, this is equivalent to A=abc noting that b is assumed to be 1cm we habe A=ac, where m=a and x=c
In short the slope of the line of best fit in the molar absorbtivity
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How does the molar absorptivity depend upon the concentration mole per L of the dissolved solute?
Molar absorptivity is completely independent of concentration of a substance as Molar absorptivity is represented by epsilon and is a constant. Absorbance of light is what is dependent upon concentration and will go down as concentration goes down and increase as concentration increases.
How mack to 0.1NAgno3?
To make You need the molar mass of Silver nitrate to make 0.1 Silver Nitrate.
What is the molar mass of Fe(NO3)2?
The molar mass of anhydrous iron(II) nitrate is 179,91 g.
What is the molar mass of mercury nitrate?
Mercury nitrate has the formula Hg(NO3)2Adding up the atomic mass for all elements present one arrives at a molar mass = 324.7 g/mol
What is the molar absorptivity of Cu2 plus at 620 nm given that the cuvettes used in lab had a pathlength of 1.00 cm with a concentration verse absorbtivity curve of y equals .727x plus .0557?
.727/g*M, slope is molar absorbtivity
Why can you not measure the molar absorptivity of the food dyes?
You can.
How does the molar absorptivity depend upon the concentration mole per L of the dissolved solute?
Molar absorptivity is completely independent of concentration of a substance as Molar absorptivity is represented by epsilon and is a constant. Absorbance of light is what is dependent upon concentration and will go down as concentration goes down and increase as concentration increases.
How much Ba is necessary for a loading of 10 percent wt while molar ratio of barium nitrate to CoCO3 is 0.065?
COBALT CARBIDE OZIDE
Why is hydrochloric acid added in a molar absorptivity of benzoic acid?
It is added to protonate the sodium benzoate.
What is the molar absorptivity of crystal violet?
The molar absorptivity of crystal violet can be determined using Beer's Law. Beer's Law is A=E*c*l where A is absorbance, E is the molar absorptivity, C is the concentration of the crystal violet, and l is the path length. Path length is how long the light has to travel through the solution. If you can find the absorbance of a certain concentration by using a spectrophotometer, where the path length is 1 cm, then you know all the variables and are able to solve for the molar absorptivity. For example, the measured absorbance of 2.5x10^-5 M CV (crystal violet) is 1.64 with a path length of 1 cm. This means 1.64=E*(2.5x10^-5)*1 E=1.64/(2.5x10^-5) E=65600 Happy Chemistry!
How much does potassium nitrate weigh?
The molar mass of potassium nitrate is 101,1032 g.
What is the molar mass for nitrate?
169.8731 g/mol
What is molar mass of cobalt?
Molar mass of cobalt III sulfate is 406.04 (g.mol-1)How it's done:Establish the molecular formula: Co2(SO4)3Then:Add up all atom mass's2 * 58.93 = 117.86 (for 2 Cobalt)3 * ( 32.06 + 4*16.00 )= 288.18 (for 3 Sulfate)Finally:Totalize: 406.04
How mack to 0.1NAgno3?
To make You need the molar mass of Silver nitrate to make 0.1 Silver Nitrate.
What is the molar mass of ammonium nitrate?
80.043 g/mol
When 0.027823 mol of lead II nitrate is dissolved in enough water to make 800 mL of solution what is the molar concentration of nitrate ions?
The formula of lead (II) nitrate is Pb(NO3)2. This shows that in any solution of lead nitrate only, the molar concentration of nitrate ions will be twice as much as the molar concentration of lead (II) nitrate. Molar concentration is defined as number of moles per liter of solution, and 800 mL is the same as 0.800 liters. Therefore the molar concentration of nitrate ions in the specified solution will be 2(0.027823/0.800) or 6.96 X 10-2 . Only three significant digits are justified because that is the number of digits in 800.
What is the molar mass of Fe(NO3)2?
The molar mass of anhydrous iron(II) nitrate is 179,91 g.
