Table of contents

1. Chemical Measurements1h 50m
2. Tools of the Trade1h 17m
3. Experimental Error1h 52m
4 & 5. Statistics, Quality Assurance and Calibration Methods1h 57m
6. Chemical Equilibrium3h 41m
7. Activity and the Systematic Treatment of Equilibrium1h 0m
8. Monoprotic Acid-Base Equilibria1h 53m
9. Polyprotic Acid-Base Equilibria2h 17m
10. Acid-Base Titrations2h 37m
11. EDTA Titrations1h 34m
12. Advanced Topics in Equilibrium1h 16m
13. Fundamentals of Electrochemistry2h 19m
14. Electrodes and Potentiometry41m
15. Redox Titrations1h 14m
16. Electroanalytical Techniques57m
17. Fundamentals of Spectrophotometry50m

1. Chemical Measurements

Volumetric Analysis

Analytical Chemistry

1. Chemical Measurements

Volumetric Analysis

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Multiple Choice

In volumetric analysis, for which type of analysis is it necessary to collect timed specimens?

Preparation of calibration curves

Kinetic studies of reaction rates

Gravimetric determination of solids

Standardization of titrant solutions

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Verified step by step guidance

Understand the context of volumetric analysis: Volumetric analysis involves measuring the volume of a solution to determine the concentration of a substance. Timed specimens are collected when the reaction rate or time-dependent changes are critical to the analysis.

Review the options provided: The problem lists four types of analyses: (1) Preparation of calibration curves, (2) Kinetic studies of reaction rates, (3) Gravimetric determination of solids, and (4) Standardization of titrant solutions.

Analyze each option: (1) Preparation of calibration curves does not require timed specimens because it involves creating a relationship between concentration and instrument response. (2) Kinetic studies of reaction rates require timed specimens because reaction rates depend on time and must be measured at specific intervals. (3) Gravimetric determination of solids involves weighing solids and does not depend on time. (4) Standardization of titrant solutions involves determining the concentration of a titrant and does not require timed specimens.

Conclude that the correct type of analysis requiring timed specimens is 'Kinetic studies of reaction rates,' as this involves monitoring how the concentration of reactants or products changes over time.

Understand the importance of timed specimens in kinetic studies: Timed specimens allow for the calculation of reaction rates and the determination of rate laws, which are essential for understanding the mechanism of a chemical reaction.