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- Describe calibration (it's principles) as used in Analytical Chemistry.What are the advantages and disadvantages of volumetric and gravimetric analysis?1. Differentiate the following terms. Accuracy Precision 2. What are the advantages of using the analytical balance in analytic chemistry? Enumerate at least two then explain each. 3. What are the factors affecting the discrepancies in accuracy and precision? Enumerate at least four then explain each.
- What is a calibration plot or curve?What is the meaning of a confidence interval?The spectroscopic data in the table is generated with five solutions of known concentration. Concentration (M) 0.0133 m= 0.0266 0.0532 0.106 0.213 Absorbance 0.1271 What is the intercept of the linear regression line? 0.08531 0.5388 1.069 Use a spreadsheet program, such as Microsoft Excel, to graph the data points and determine the equation of the best-fit line. 1.954 What is the slope of the linear regression line formed by these points? M-1
- What is the importance of calibrating analytical balances?List and define the indicators that are used to assess the performance of a specific analytical method under specified conditions.Norepinephrine can be analyzed in human urine. A fixed amount of DHBA was added to each sample and standard in a fixed concentration. Please explain the analytical function of adding DHBA. To the 1 mL of urine sample, small amounts of 1 µg/mL norepinephrine standard is added and the following results were obtained. What is the concentration of the norepinephrine in the urine sample with uncertainty?
- Write a informative essay about separation of mixtures in Chemistry.Analytical chemistry is a particular field within the broader spectrum of the chemical sciences, in which many times the focus of analytical experiments is to develop new methods to analyze compounds, either structurally or by determining concentrations of compounds. One of the processes analytical chemists use to determine the exact concentration of a working solution is called standardization. In your own words, describe the differences between a primary, secondary, and tertiary standard, and describe the underlying concept behind the standardization process. Why is it done?3. What is parallax and why must it be avoided when measuring liquids with a graduated cylinder and other volumetric apparatus?
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