An acid-base indicator, hln, dissociates according to the following reaction in an aqueous solution. hinlag) in (aq) h (aq) the protonated form of the indicator, hln, has a molar absorptivity of 2929 m cm 1 and the deprotonated form, in has a molar absorptivity of 20060 m-1. cm 1 at 440 nm. the ph of a solution containing a mixture of hin and in s adjusted to 6.12. the total concentration of hin and in s 0.000127 m. the absorbance of this solution was measured at 440 nm in a 1.00 cm cuvette and was determined to be 0.818. calculate pka for hin.

Explanation:

To calculate the dissosiation factor of the HIn first we need to determine the concentration of ions in the solution. To do that we use the Lambert-Beer's law:

Where:

A is the absorbance

a is the absorptivity

b is the length of the cuvette

c is the concentration

With this absorptivity we can calculate the concentration of HIn and In:

For the Ka:

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

fe 55.85 g/mol and h2o 18.02 g/mol.