Chemistry for Engineers - Lab

Chemistry for Engineers - Lab

Mass

actual amount of material

Weight

force from mass and gravity

Electronic Balance

uses electronic sensors to measure mass

Triple Beam Balance

uses counterweights to measure mass

Triple Beam Balance

1. Calibrate to zero

2. Place sample

3. Move scales

Graduated Cylinder

Accurate, for transferring

Pipette

Most accurate, for transferring

Beaker

Estimation, for containing

Bunsen

has no gas valve

Tirrill

used in lab

Meker

for higher temperature

A process to separate sediment from filtrate

Filtration

Filtration

1. Fluted Filter paper

2. Glass Funnel

3. Erlenmeyer flask

conical-shaped container with long neck

erlenmeyer flask

shallow, flat cylinder plate

petri dish

Chemical Hazard

occupational or environmental risk due to chemical exposure

physical hazard

can cause physical injury

health hazard

from repeated exposure (Mutagenic, Carcinogenic, Teratogenic, Specific Target Organ)

environmental hazard

harmful to environments

Environmental

acute toxicity

Oxidizer

Gas Under pressure

explosive

health

irritant

flammable

corrosion

chem label 1

Product Id

chem label 2

Signal Word

chem label 3

Hazard statement

chem label 4

Precautionary statement

chem label 5

supplier id

chem label 6

pictograms

GHS

Globally Harmonized System

1-3

Identification, Hazard ID, composition

4-6

First-aid, Firefighting, Accidental Release Measures

7-8

Handling & Storage, Exposure Control/Personal Protection

9-11

Physical & Chemical Properties, Stability & Reactivity, Toxicological Information

4 classifications for storage

Organic, inorganic, flammable, corrosive

constant pressure

for non-combustion

constant volume

for combustion

Heat of Combustion

reaction of chemical with O2 fuel under heat

number of moles

initial mass - final mass / molar mass of compound

heat

q=mc(Tf-Ti)