Difference between revisions of "Double replacement"
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| − | A '''double replacement''' or double displacement is a reaction where two cations exchange anions or vice versa. | + | A '''double replacement''' or '''double displacement''' is a reaction where two cations exchange anions or vice versa. |
These reactions are usually in equilibrium; they proceed to completion in the following cases: | These reactions are usually in equilibrium; they proceed to completion in the following cases: | ||
Revision as of 20:07, 17 February 2016
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A double replacement or double displacement is a reaction where two cations exchange anions or vice versa.
These reactions are usually in equilibrium; they proceed to completion in the following cases:
- One of the resulting products is insoluble and precipitates (e.g. barium sulfate);
- One of the resulting products is a poorly dissociated, mostly molecular compound (e.g. water);
- One of the resulting products is volatile and is distilled off the mixture (e.g. nitric acid);
- One of the resulting products is unstable and decomposes into non-ionic products such as gases and water (e.g. carbonic acid);
