Colbalt monoxide CoO the blue color in ceramics glazes is pr

Colbalt monoxide CoO, the blue color in ceramics glazes, is prepared by decomposing cobalt (II,III) oxide at 950degree celsius.

A) according to the stoichiometry, how many kg of CoO (theoretical yield) canbe prepared form 32.09g of Co_(3)O_(4)?

B) Find the percent yield, if the experimental preparation gave 20.5g of CoO?

Solution

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Cobalt Oxide General Description:

a) Cobalt oxide may refer to:

1) Cobalt (II) oxide (cobaltous oxide) - CoO

2) Cobalt (III) oxide (cobaltic oxide) - Co₂O₃

3) Cobalt (II,III) oxide - Co₃O₄

b) Cobalt (II) oxide appears as olive-green to red crystals, or greyish or black powder. It is used extensively in the ceramics industry as an additive to create blue colored glazes and enamels as well as in the chemical industry for producing cobalt(II) salts.

Cobalt Oxide Typical Chemical Purities Available:

Purities between 99.0% and 99.999%

Cobalt Oxide Powder Typical Granulations Available:

Targets, pieces and powder

Cobalt Oxide (Co0) Typical Physical Constants:

Molecular Weight (g/mol.)

74.9326

Density (gm/cm3)

6.44

Specific Gravity

6.11

Sensitivity

air & moisture sensitive

Melting Point ( °C)

~1935

Merck

14,2446

EC Cumber

215-154-6

RTECS Number

GG2800000

Solubility

negligible

Odor

odorless

Crystallography

cubic

Color

green, red, gray, or black powder