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A solution containing 5.24 mg/IOO mL of A (335 g.'mol) has a transmittance of55.2% in a
Chapter 13, Problem 13-6(choose chapter or problem)
A solution containing 5.24 mg/IOO mL of A (335 g.'mol) has a transmittance of55.2% in a 1.50-cm cell at 425 nm. Calculate the molar absorpti\'ity of A at thiswavelength.
Questions & Answers
QUESTION:
A solution containing 5.24 mg/IOO mL of A (335 g.'mol) has a transmittance of55.2% in a 1.50-cm cell at 425 nm. Calculate the molar absorpti\'ity of A at thiswavelength.
ANSWER:Step 1 of 3
*Mass of substance=5.24 mg/100mL=0.0524 g/L
*Number of moles of the substance=335 g/mol
The molar mass of a substance is calculated by the formula
, Where:
M is the molar mass of the solution.
m is the mass of the substance in the solution.
n is the number of moles of a substance in the solution.
Substituting in the above equation, we get
The concentration of the solution is