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Quantitative Chemical Analysis Overview
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Quantitative Chemical Analysis Overview

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Questions and Answers

What physical properties can be measured in physical methods of quantitative analysis?

Density, refractive index, absorption or polarization of light, electromotive force, magnetic susceptibility, and others

What are the two major types of strictly chemical methods used in quantitative chemical analysis?

Gravimetric analysis and volumetric, or titrimetric analysis

Why is a combination of qualitative and quantitative methods often necessary in an analysis?

Qualitative methods are used for separating desired constituents from a sample, while quantitative methods are used for measuring the amounts present

What is the basic tool used in all quantitative analyses?

<p>Analytical balance</p> Signup and view all the answers

How much more sensitive should the balance be for microanalyses compared to usual analytical work?

<p>About 1,000 times more sensitive</p> Signup and view all the answers

What level of sensitivity is required for an analytical balance in usual analytical work?

<p>0.1 milligram (about 0.000004 ounce)</p> Signup and view all the answers

What is the main principle behind titrimetric analysis?

<p>Determining the amount of a substance by measuring the volume it occupies.</p> Signup and view all the answers

Define titration.

<p>Titration is the process of determining the quantity of a constituent in a sample by adding an exactly known quantity of another substance.</p> Signup and view all the answers

What is a burette used for in titration?

<p>To gradually add a standard solution of titrating reagent to the sample.</p> Signup and view all the answers

When is the addition of titrating reagent stopped in a titration?

<p>When the equivalence point is reached.</p> Signup and view all the answers

What is the difference between the end point and the equivalence point in a titration?

<p>The titration error.</p> Signup and view all the answers

How is the completion of the reaction marked in a titration?

<p>By observing a signal such as a color change of an indicator.</p> Signup and view all the answers

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