[1S] UNIT 1.3-4 Laboratory Mathematics & Instrumentation

Question 1

Different ways of expressing concentration of solutions

Answer 1

• Molarity
• Normality
• Molality
• Percent solutions
• X solution

Question 2

is defined as the number of units of solute to the number of units of solvent.

Answer 2

Ratio

Question 3

T/F: Dilution is always expressed as a colon (x:x).

Answer 3

F; Ratio

Question 4

Solute:solvent

Answer 4

Ratio

Question 5

is defined as the number of units of solute to the number of units of solution.

Answer 5

Dilution

Question 6

To express dilution, a _______ _________ is used, which is the ratio of the concentrated material to the final concentration or volume of solution (Bishop et al., 2013).

Answer 6

Dilution Factor

Question 7

Solute:solution

Answer 7

Dilution

Question 8

Solute:solution

Answer 8

Dilution

Question 9

T/F: Dilution is done when:
• Sample is limited
• Need to establish titer
• Standard curve is needed

Answer 9

T

Question 10

For sterilization of materials and supplies needed in the laboratory; also for disinfecting infectious waste (121C, 15 psi, for 20 minutes)

Answer 10

Autoclave

Question 11

temp, psi, minutes using autoclave

Answer 11

121C, 15 psi, 20 mins

Question 12

To evaporate to dryness materials after washing and/or after autoclaving (30 - 300 C)

Answer 12

Drying Oven

Question 13

For weighing reagents/materials

Answer 13

Analytical Balance

Question 14

For melting agarose powder in buffer

Answer 14

Microwave

Question 15

For amplification of nucleic acids; commonly known as PCR machine

Answer 15

Thermal Cycler

Question 16

A dry place to heat solution due for incubation

Answer 16

Heat Block

Question 17

Used to separate solid particles from liquid suspension through centrifugal force

Answer 17

Centrifuge Machine

Question 18

Used to read absorbances of solution as light passes through the sample

Answer 18

Absorbance Reader

Question 19

For visualizing electrophoretic bands

Answer 19

Gel Documentation Viewer

Question 20

A working area designed to protect the workers from infectious agents;, at the same time, protects the materials being manipulated from environmental contaminants

Answer 20

Biosafety Cabinet