Silver is a mineral that can be identified by its unique physical properties. It is a very resistant mineral that does not dissolve in most solvents and does not react to water or oxygen.Continue Reading
Silver can be found in the Earth as a mineral and is one of the most famous precious metals. Most silver is extracted from silver ores, but it can be mined from Native Silver. It has a bright luster that is metallic and when it is untarnished it looks white. When silver tarnishes, it turns dark yellow or black. Silver can combine with different elements to form other minerals and ores.
Though exposure to air tarnishes silver, there are chemical coats that can protect it from tarnishing and polishes that can remove the tarnish. As a mineral, silver can crystallize, but crystallized silver is very rare. Silver is soft with a hardness on the Mohs scale of a 2 or 3. It is malleable and ductile. Silver is used in jewelry, silverware and electrical products. It is considered the best conductor of electricity. Silver can be formed in volcanic basalt rocks and in hydrothermal and mesothermal veins. It can also be formed by the breakdown of sulfur.Learn more about Chemistry
Boiling stones are pieces of mineral put in a solution and heated in a round-bottomed flask so that boiling will be even. Without boiling stones, liquids heated in such flasks have a tendency to superheat without bubble formation and then violently boil all at once. This can be problematic in techniques such as distillation where one does not want superheated liquid pushed up into the condenser.Full Answer >
To be classified as a mineral, a substance must have the following four characteristics: it must be organic, naturally-occurring, solid and a have a definite chemical composition. A substance must also have an ordered internal structure.Full Answer >
Mineral oil is made from any oil-producing mineral source, which is typically (but not always) a petroleum product. Petroleum-based oils are also known as white oil, liquid petroleum and liquid paraffin. Mineral oil is frequently perfumed and sold as baby oil.Full Answer >
Liquid thermometers contain either mercury, alcohol or mineral spirits. Mercury thermometers, which are not widely used any longer as of 2015 due to the toxic nature of the element, have a silver liquid in them. Alcohol and mineral-spirit thermometers have a dyed liquid, as the liquids are naturally colorless.Full Answer >