Lec 1: Lab Math

Question 1

These are the figures in a number that have meaning. They are determined by the desired accuracy and precision of a given equipment or procedure.

Answer 1

Significant figures

Question 2

What are the systems of measurement?

Answer 2

English, Metric. and SI systems

Question 3

Which system of measurement is most commonly used inside the CC lab?

Answer 3

SI

Question 4

SI unit for mass

Answer 4

Kg

Question 5

SI unit for electrical current

Answer 5

Ampere

Question 6

SI unit for time

Answer 6

Second

Question 7

SI unit for temperature

Answer 7

Kelvin

Question 8

SI unit for amount of substance

Answer 8

Mole

Question 9

SI unit for luminous intensity

Answer 9

Candela

Question 10

SI unit for length

Answer 10

Meter

Question 11

A solution is made up of which two components?

Answer 11

Solute and solvent

Question 12

Classification of solutions

Answer 12

True solutions, colloids, suspensions

Question 13

Four ways of expressing concentrations of solution

Answer 13

Percent solution
Molarity
Molality
Normality

(Words you can hear)

Question 14

Three ways of expressing percent solutions

Answer 14

w/w, v/v, w/v

Question 15

The amount of solute per 100 total units of solution

Answer 15

Percent solution

Question 16

The number of moles of solute for every kilogram of solvent

Answer 16

Molality

Question 17

The number of moles of solute for every liter of solution

Answer 17

Molarity

Question 18

Gram the number of equivalent weights for every liter of solution

Answer 18

Normality

Question 19

Defined as:

mw/ valence or number of replaceable H or OH

Answer 19

Equivalent weight

Question 20

Defined as the addition of more solvent to lower the concentration of a solution.

Answer 20

Dilution

Question 21

Two types of dilution

Answer 21

Simple and serial

Question 22

One-step dilution

Answer 22

Simple

Question 23

also called sequential dilution; the samples in succeeding tubes come from previous tubes except for the initial dilution; solution dilution differs from the tube dilution

Answer 23

Serial dilution

Question 25

Substances that are capable of releasing hydroxyl ions in solution

Answer 25

Bases

Question 27

Solutions that are capable of resisting sudden pH changes.

Answer 27

Buffer solutions

Question 28

Dispersed phase

Answer 28

Solute

Question 29

Dispersing phase

Answer 29

Solvent

Question 30

Value used for calculating molarity, molality, and normality

Answer 30

Molecular weight

Question 31

Ratio of the density of a particular substance with that of water

Answer 31

Specific gravity

Question 32

Other names for %Assay

Answer 32

Percent purity or Assay purity