Principles of Instrumental Analysis
7th Edition
ISBN: 9781337468039
Author: Skoog
Publisher: Cengage
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Chapter 1, Problem 1.2QAP
What is the information processor in an instrument for measuring the color of a solution visually?
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C. The lead(II) oxide was weighed before and after the additions.
d.
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before
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ii. What method is used to separate the mixture in stage 3?
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iii. What term is used to describe the unreacted lead(II) oxide?
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13
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Use the balance diagrams to work out the mass of lead(II) oxide added to the dilute nitric
acid.
after
i. How would the student know when all of the dilute nitric acid had reacted in stage 2?
e. Describe the effect of heating the solution of lead(II) nitrate until it boils and then heating
for a further ten minutes.
The spectroscopic data given in the table was generated for two different concentrations of a solution.
Concentration (M)
Absorbance
0.0141
0.1391
0.1445
0.6015
What is the slope of the line formed by these points?
m =
3.545
What is the y-intercept?
b = 0.0893
What is the concentration of a solution with an absorbance of 0.333 ?
concentration:
Incorrect
M
What is the name of a chemical agent that changes color and helps us whether determine a particular substance is present?
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- Which instrument can be used best to detect metals in Water like POTASSIUM?arrow_forward1. Explain both precision and accuracy as they pertain to chemical measurements. 2. Why would you use the method of standard addition to calibrate a measurement instead of a calibration curve?arrow_forwardPlease explain to me, 1 step at a time, how to solve #93. I am not sure what they are doing on each step of the solution, they are just combining it into one long math problem, and I dont understand what each step is doingarrow_forward
- Make certain you record all measured values to the proper number of significant figures and state the unit of each measured value. A. Measuring the Mass of a Solid and Determining the Quality of a Balance Unknown Number: Balance/Desk Number: Mass of unknown, first weighing: (Reminder: Significant figures and units.) Mass of unknown, second weighing: 1.32 1.33 Mass of unknown, third weighing: 132 Mass of unknown, fourth weighing: 1.34 Mass of unknown, fifth weighing: 1.32 Mass of unknown, sixth weighing: 1.33 Average mass of the unknown: 1.33 (Please show calculations here.) 1.32+1:33+ 1:32 t1:34 +1:32 + 1.33 ='132666667 ?1'33 Highest measured mass: Lowest measured mass: Stand devi of the averaged values: (Please show calculations here.)arrow_forwardPlease explain what tables are used to find the answers.arrow_forwardWhy would a chemist find fault with the phrase “pure orange juice”?arrow_forward
- Explain the fundamental steps of the scientific method. The scientific method is a dynamic process. What does this mean?arrow_forward2.95 Engineers who design bicycle frames are familiar with the densities of aluminium (2.699 g/cm3), steel (7.87 g/cm3), and titanium (4.507 g/cm3). How does this information compare with Figure 2.12, and what would it suggest for changes in this figure if more shades were used for the density colour-coding? (Iron is the principal component of steel)arrow_forwardCan you please explain how to input this equation on a calculator? I am not getting the correct answer when inputting the equation into my ti-84. Thanks.arrow_forward
- for number 10, do we have to match the color of the solution, like if it was red we make it read or should we match it with the color absorbed by the solution, such as green- red, orange- blue, and so on?arrow_forward1. What is a spectrophotometer used for in a cobalt chloride solution analysis?arrow_forwardIn general,the color that we see is __to the color absorbed. What words should be put in the blank?arrow_forward
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