Common Compounds

Lead Chloride (

PbCl₂₎      

Molar mass: 278.10 g/mol
Density: 5.85 g/cm³
Melting Point: 501° C
Boiling Point: 950° C

• Inorganic, white solid compound which forms naturally through minerals
• Lead Chloride is not very soluble in water 
• Each lead is coordinated by 9 chloride ions
• PbCl₂ is used in production of infrared transmitting glas
• Sometimes 
  PbCl₂
   is used as white pigment in paint

Lead Chloride

Lead Dioxide (PbO₂)

Molar Mass: 239.2 g/mol

Density: 9.38 g/cm³

^{Melting Point: 290° C
Boiling Point: Decomposes at 290° C}

• Sometimes known as plumbic oxide
• Lead dioxide is insoluble in water
• Dark brown crystalline powder
• Strong oxidizing agent and can be used to manufacture matches and dyes
• Applied in electrochemistry by being a main component of lead acid batteries

Electrochemistry: Branch of chemistry which studies reactions involving a solution of an electron conductor and and ionic conductor

Dark brown powder Lead Dioxide 

Lead (II) Acetate Pb(C₂H₃O₂)₂

Molar Mass: 325.29 g/mol
Density: 3.25 g/mol³
Melting Point: 280° C
Boiling Point: 200° C

• Lead (II) Acetate is a white crystalline substance
• This toxic compound is formed by combining lead oxide and acetic acid
• Used as a sugar substitute in history (first by the ancient Romans)
• Rumored that Ludwig van Beethoven may have died because of amount of lead acetate in his wine
• Sometimes known as the "sugar of lead"
• Used in some hair coloring/growing products

Most common men's hair care product containing lead (II) acetate

Lead (II) Nitrate Pb(NO₃)₂

Molar Mass: 331.2 g/mol

Density: 4.53 g/mol³

Melting Point: 270° C
Boiling Point: Decomposes at 400° C

• This inorganic compound can be either in a white powder or a clear crystal form
• Compound does not naturally occur, it is composed by mixing lead oxide and nitric acid
• Like most lead products, it is toxic to the human body
• Main resource in the production of different colored pigments of lead paint
• Recently, lead (II) nitrate has started being used in gold cyanidation* 
• Lead (II) Nitrate is an oxidizing agent (compound that transfers oxygen atoms)
• Occasionally used in the production of fireworks
• *Technique used to extract gold from lower-grade ore.  This is done by converting the gold into a water soluble metal complex

White powder form of lead (II) nitrate

Lead (II) Bromide PbBr₂

Molar Mass: 367.1 g/mol

Density: 6.66 g/mol³

Melting Point: 373° C
Boiling Point: 916° C

• The appearance of lead (II) bromide is a colorless crystalline or a white powder
• Formed by combining lead nitrate and bromide dissolved in water
• When lead (II) bromide is heated to 367° C, it becomes a weak electrical conductor
• Pure lead (II) bromide can be significantly used in the optical field. It has a low diffraction efficiency* which allows it to be helpful in spectral analysis systems and optical signal processing
• Very soluble in water
• *Diffraction efficiency is the twisting and bending of waves around small obstacles and the spreading of waves through small openings

Lead (II) Bromide as a weak electrical conductor