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Internal standard. A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00

Quantitative Chemical Analysis | 8th Edition | ISBN: 9781429218153 | Authors: Daniel C. Harris ISBN: 9781429218153 475

Solution for problem 20-22 Chapter 20

Quantitative Chemical Analysis | 8th Edition

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Quantitative Chemical Analysis | 8th Edition | ISBN: 9781429218153 | Authors: Daniel C. Harris

Quantitative Chemical Analysis | 8th Edition

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Problem 20-22

Internal standard. A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00 mL of standard (S) containing 8.24 g S/mL and diluting the mixture to 50.0 mL. The measured signal quotient was (signal due to X/signal due to S) 1.690/1.000. (a) In a separate experiment, in which the concentrations of X and S were equal, the quotient was (signal due to X/signal due to S) 0.930/1.000. What is the concentration of X in the unknown? (b) Answer the same question if, in a separate experiment in which the concentration of X was 3.42 times the concentration of S, the quotient was (signal due to X/signal due to S) 0.930/1.000.

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Common Biases and Errors in Decision Making • Representativeness Bias • The degree to which a single event is similar to its parent population • Anchoring Bias • Using early, first received information as the basis for making subsequent judgments • Confirmation Bias • Selecting and using only the facts that support our decision • Availability Bias • Emphasizing information that is most readily at hand • Recent and Vivid information • Randomness Error - Creating meaning out of random events – superstitions • Winner’s Curse - Highest bidder pays too much due to value overestimation • Likelihood increases with the number of people in auction • Escalation of Commitment - Incr

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Chapter 20, Problem 20-22 is Solved
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Textbook: Quantitative Chemical Analysis
Edition: 8
Author: Daniel C. Harris
ISBN: 9781429218153

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Internal standard. A solution was prepared by mixing 10.00 mL of unknown (X) with 5.00