I know that cobalt II means that it's Co with a 2+ charge, and sulfate is SO4 with a 2- charge, but is cobalt II sulfate heptahydrate CoSO4 x 7H2O?
what is heptahydrate?!?!?!?!?
2007-07-15 05:17:04 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
It is a compound in which there are 7 moles of H2O for each mole of CoSO4 ( it is a hydratated salt)
2007-07-15 05:23:42 · answer #1 · answered by Dr.A 7 · 0⤊ 1⤋
Cobalt II sulfate heptahydrate
General
Synonyms: cobalt sulfate 7-hydrate, sulfuric acid cobalt (2+) salt heptahydrate, bieberite
Molecular formula: CoSO4 . 7H2O
CAS No: 10026-24-1
EC No:
Physical data
Appearance: pink or red crystals
Melting point: 97 C
Boiling point: ca. 735 C (decomposes)
Vapour density:
Vapour pressure:
Density (g cm-3): 1.95
Flash point:
Explosion limits:
Autoignition temperature:
Water solubility: appreciable
Stability
Stable. Non-flammable. Hygroscopic. Dehydrates at around 41 C and 71 C.
Toxicology
Harmful if swallowed or inhaled. Respiratory irritant. May cause an allergic skin reaction. May act as a carcinogen if inhaled.
Toxicity data
ORL-RAT LD50 582 mg kg-1
IVN-DOG LDLO 16 mg kg-1
IMS-RAT LD50 320 mg kg-1
Risk phrases
R20 R22 R36 R37 R38 R43 R49 R50 R53.
Environmental information
Very toxic in the environment.
Transport information
Non-hazardous for air, sea and road freight.
Personal protection
Safety glasses. Good ventilation - do not breathe dust...
2007-07-15 06:56:27 · answer #2 · answered by Anonymous · 0⤊ 0⤋
A bit more detail than the other answers.
Cobalt sulfate is a chemically bonded salt, in this case, ionic bonding.
A hydrate is when molecules of water are physically trapped inside the cell structure, like a prisoner in a cage. The wate is physically bonded, not chemically. Usually, heating the hydrate salt will "liberate" the trapped water and it escapes. This salt is then called Anhydrous. If left standing in the open, it eventually reabsorbs moisture from the air and becomes a hydrate again.
2007-07-15 06:42:44 · answer #3 · answered by reb1240 7 · 0⤊ 0⤋
Co II sulfate heptahydrate is a salt of Co II, at which you have coordinated 7 molecules of water, for every molecule of salt
2007-07-15 05:27:59 · answer #4 · answered by ancutzaurs 2 · 0⤊ 0⤋
First, find the difference in the mass of the heptahydrate and the mononhydrate. Then, divide that value by 6. With the value you've divided, subtract it from the mass of the monohydrate. I think so.
2016-04-01 05:21:33 · answer #5 · answered by Anonymous · 0⤊ 0⤋