/ˈkalsʌɪn,ˈkalsɪn/
verb
gerund or present participle: calcining
reduce, oxidize, or desiccate by roasting or exposing to strong heat.
"calcined bone ash"
The cache is NOT at the posted coordinates.
To find the cache you will need to solve this following puzzle:
Calcination vs Roasting
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Calcination
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Roasting
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| one is heated in the absence or limited supply of oxygen or air |
One is heated in the presence of excess of oxygen or air. |
| This method is employed for sulphide ores. |
This method is employed for carbonate ores. |
| Carbon dioxide is produced along with metal oxide. |
Sulphur dioxide is produced along with metal oxide. |
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Example: ZnCO3--> ZnO+ C02
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Example: For the ores ZnS (sphalerite) and Cu2S (chalcocite), balanced equations for the roasting are:
2ZnS+3O2-->2 Zno+ 2SO2
2 Cu2S + 3O2 → 2 Cu2O + 2 SO2
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This cache is #24 in the ☯ series
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