CHEM EXAM 3: NATURALLY OCURRING STATE

Ne

inert noble gas, does not form compounds in naturally occurring state. isolated from the atmosphere through fractional distillation of liquid air

O2

occurs naturally as H2O water and CO2, Electrolysis of water splits water molecules into hydrogen and oxygen gas

H2

Steam Methane Reforming (SMR): reacts methane (CH4) with steam (H2O) at high temps yielding Hydrogen and CO,

CH4+H2O→CO+3H2

I2

naturally occurs in brine or iodide salts, Oxidize the I- ions in an acidic solutions, then purify through sublimation

Fe

S

natural deposits, or from natural gas. Claus Process

2H2S+O2→2S+2H2O

He

noble gas that does not naturally form chemical bonds. Found in natural gas deposits and extracted through cryogenic distillation.

High Purity Si

natural state is silica, or sand.