103 final

What is the temperature of liquid nitrogen

-196

What is the temperature of CO2Isoproanol?

-78

What is the temperature of Liquid ammonia?

-33

What is the temperature of Liquid SO2?

-10

NFPA blue diamond numbers 0,1,2,3&4 what do they mean?

0 normal

1 slightly hazardous

2 hazardous

3 extreme danger

4 deadly

NFPA red diamond numbers 0,1,2,3&4 what do they mean?

0 will not burn

1 above 200F

2 between 100 and 200 F

3 below 100F

Below 73F

NFPA diamond the yellow one what doe the numbers 0,1,2,3&4 mean?

0 stable

1 unstable if heated

2 violent chemical change

3 shock and heat may detonate

4 may detonate

Temperature of

Bunsen burner, hot plate, heating mantle

800-1000

200-500

400-500

Chemical waste disposal of:

A Dichromate

B Iodate

C Lead

D Ag,Au,Pt

A- treated with NaHSO4 to get insoluble Cr(OH)3

B- treated with NaHCO3 to convert to iodide

C- lead is treated with NaSiO3 to get PbSiO3

D- precious metals are recovered.

Disposal of toxic gas

A CO2

B SO2

A treated with NaOH

B treated with Ca(OH)2

Types of fire:

A

B

C

D

A water and quenchable

B blanketing with foam

C electrical fire

D combustible reactive metals

What are the flash points of:

A diethyl ether

B kerosine oil

C acetone

D isopropanol

E compressed gases

A -45

B 37.8-65.6

C -17

D 11.7

E no flash points already gases

At what number do vapors density are dangerous and why?

When it is greater than 1, because their vapors accumulate the floor, high risk of fire because of molecules easily flow and can reach the flame of electrical outlets.

An oxidizing agent and dehydrating agent and causes severe corrosion

Sulfuric acid (H2SO4)

Examples of reactive chemicals

Dry picnic acid, nitroglycerin, lead azide.

Examples of oxidizers

Peroxides, chlorates, perchlorates , nitrates.

Water reactive metals

Alkali metals, NaBH4, calcium phosphate

High toxicity

Medium

Low

What are the numbers of lethal doses

High - Ld> 50mg/kg

Medium - LD >200mg/kg not more than 1000

Low - LD >200mg/kg not more than 2000

Examples of bio safety levels

bsl1

Bsl2

Bsl1 - HIV and worming with human blood

Bsl2 - mycobacterium and yellow fever virus.