Calcium: Difference between revisions
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JeffEvarts (talk | contribs) (Created page with "{{Compound|name=Calcium|chemf=Ca|density=1.55|num=20|stp_p=solid|group=Alkali Earth Metals|mm=40.1|mp=842|bp=1484|nfpa_h=3|nfpa_f=1|nfpa_r=2|nfpa_o=<s>W</s>}} Elemental Calciu...") |
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Latest revision as of 10:55, 20 June 2019
Chemical formula | Ca |
---|---|
Atomic Number | 20 |
OTP appearance | solid |
Molar Mass(g/mol) | 40.1 |
Density(g/cc) | 1.55 |
Melting Point(°C) | 842 |
Boiling Point(°C) | 1484 |
NFPA 704 |
Elemental Calcium is rarely required. Normally it is used in a reduced state.
Uses
Justification Questioned
- Many calcium compounds are used in this experiment
Natural occurrence
- Elemental calcium does not occur naturally
- Calcium carbonate is a major component of the minerals calcite, chalk and limestone
- Calcium phosphate and calcium carbonate are major components of bone and shell
Production
Extraction
Electrolysis of calcium chloride
- Produce calcium chloride from calcium ores by combining them with hydrochloric acid
- CaCO3 + 2 HCl → CaCl2 + H2O
- Electrolyze at 775°C, 100V
- CaCl2{Ca + Cl2775°C 100V}→
- CaCl2
From halides
See Also
References
- ↑
Mellor, Joseph William (1912) "Modern Inorganic Chemistry"
Longmans, Green, and Co