An unknown solution of triiodide registers an absorbance of 0.782 at 362 nm. A series of triiodide solutions of known concentration were analyzed at this wavelength and a standard curve was created. The equation of the best fit line from the standard curve was determined to be A = (3.2 x 10^-1 M^-1) c, where A = absorbance and c is the concentration of the solution. The constant value in this equation is the value of el. What is the concentration of the triiodide in the unknown solution?

Question

Angelique Wiggins

Chemistry

2 September, 02:18

An unknown solution of triiodide registers an absorbance of 0.782 at 362 nm. A series of triiodide solutions of known concentration were analyzed at this wavelength and a standard curve was created. The equation of the best fit line from the standard curve was determined to be A = (3.2 x 10^-1 M^-1) c, where A = absorbance and c is the concentration of the solution. The constant value in this equation is the value of el. What is the concentration of the triiodide in the unknown solution?

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Lucia Rios · Answer 1

The standard curve was done at the wavelength of 362 nm for uniformity. We can use this function to determine the concentration at any absorbance value. At A = 0.782, c is,

A = (3.2 x 10^-1 M^-1) c

0.782 = (3.2 x 10^-1 M^-1) c

c = 2.44 M

The concentration of the triiodide solution is 2.44 M.