In a volumetric determination of an analyte A, the data obtained and their standard deviations are as follows: Initial buret reading 0.19 mL 0.02 mL Final buret reading 7.86 mL 0.03 mL Sample mass. 63.0 mg 0.2 mg From the data, find the coefficient of variation of the final result for the %A that is obtained by using the equation that follows and assuming there is no uncertainty in the equivalent mass. % A titrant volume x equivalent mass x 100 %/ sample mass Coefficient of variation = %

The following densities of water were obtained by Student A: 1.07 g/mL, 1.14 g/mL, and 1.13 g/mL. Show how Student A determined the density of water to be 1.11 ± 0.04 g/mL. Calculation for the average = 1.11 g/mL: Calculation for the standard deviation = 0.04 g/mL:

What is the relative average deviation in the following percent KHP values in ppt? 46.80% 47.23% 48.03%

5. Which term is INCORRECTLY defined? a. linear range - the range over which the response of an analytical method is proportional to analyte concentration b. dynamic range concentration range over which there is a measurable response to analyte, though the response is not linear c. blank solution - a solution containing all reagents and solvents used in the analysis to which no analyte is deliberately added d. standard solutions - solutions for which the standard deviation is known - 6. True or False: Internal standards correct random error caused by run-to-run variation. a. True b. False

From the following data, calculate the concentration of the analyte in the sample read at 700 nm: Absorbance of unknown sample = 0.807 Absorbance of a 130 mg/dl standard = 0.234 Do not answer in image format. Maintain accuracy and quality in your answer. Answer completely.

Plot a professional quality standard curve (absorbance vs. protein amount in µg) with an appropriate title and caption underneath the plot from the data give above. The caption should include the best-fit data.