The equilibrium constants for a diprotic acid are determined from a Bjerrum plot by: A)fitting the theoretical curve to the experimental curve by adjusting the pH values to minimize the square of the residuals. B)determining the slope for the upper curve which corresponds to K₁,and the slope for the lower curve which corresponds to K₂. C)varying the pH to determine the range over which the slope of the theoretical curve is zero.Lower end of range is K₁ and upper end of range is K₂. D)fitting the theoretical curve to the experimental curve by the method of least squares to find the values of K₁ and K₂ that minimize the square of the residuals. E)taking the first derivative of the experimental data to determine minimums in slope.Each minimum is an equilibrium constant.

Question

Quizplus · Accepted Answer

The best way to determine the equilibrium constants for a diprotic acid from a Bjerrum plot is by fitting the theoretical curve to the experimental curve by the method of least squares to find the values of K₁ and K₂ that minimize the square of the residuals. This approach is a standard practice in data analysis and is widely accepted as the most accurate method for determining equilibrium constants from experimental data.

The Equilibrium Constants for a Diprotic Acid Are Determined from a Bjerrum