Preliminary Exercises and Titration Theory

Question 1

Analytical Chemistry

Answer 1

The science of obtaining, processing and communicating information about the composition and structure of matter

Question 2

Quantitative Analysis

Answer 2

Determination of how much is present

Question 3

Qualitative Analysis

Answer 3

Determination of what is present

Question 4

Top-Loading Balance

Answer 4

Used for quick dispensing of reagents, 500 g max, 10 mg sensitivity (0.01 g)

Question 5

Denver Balance

Answer 5

Used for weighing larger quantities and liquids or corrosive substances, 300 g max, 1 mg sensitivity (0.001 g)

Question 6

Mettler Balance

Answer 6

Used for precise measurement of small quantities of samples and standards, 200 g max, 0.1 mg sensitivity (0.0001 g)

Question 7

Buoyancy Effect

Answer 7

Objects in air are buoyed by the volume of air displaced, so liquids will often be under weighed

Question 8

Mohr Pipet

Answer 8

A mini buret except less precise

Question 9

Aliquot

Answer 9

A portion of a solution for dilution or analysis

Question 10

Accuracy

Answer 10

Describes how close the measured value is to the true value

Question 11

Precision

Answer 11

Describes the reproducibility of a measured value

Question 12

Indeterminate Error

Answer 12

Random, non-reproducible errors, easily treated with statistical methods

Question 13

Determinate Error

Answer 13

Systematic, reproducible errors, often due to poor technique, faulty calibration or poor design, hard to correct for with statistics

Question 14

Gross Errors

Answer 14

Blunders that result in large inaccuracies

Question 15

Relative Standard Deviation

Answer 15

Standard deviation divided by mean