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What compound could be tarnish on a metal?
Tarnish on a metal could be caused by the formation of compounds such as oxides, sulfides, or chlorides. For example, silver tarnish is often silver sulfide (Ag2S), while copper tarnish is a mixture of copper oxides and sulfides. These compounds form on the surface of the metal in the presence of air and other chemicals.
Are all metals found in ores?
"No, gold, silver, and platinum are some of the metals which are not ores". Yes, these metals do occur as nuggets of native element, and are dredged, or panned from stream, and river sediments, but there are many sulfides, and oxides of these, and other metals as well. These oxides, and sulfides are the Ore Minerals sought after by prospectors, and mined from in sittu Hard Rock Deposits.
What is the name of the precipitate formed when silver nitrate react with sodium carbonate?
It should be: Silver Carbonate This is due to the solubility rules: -All nitrates are soluble -Carbonates, Hydroxides, Oxides, Silicates and Phosphates are all insoluble except for Group 1. -All binary compounds of the halogens (other than F) with metals are soluble, except for silver, mercury (I) and lead.
What makes silver lose its shiny look?
Most silver objects of everyday use are in fact Sterling Silver, which contains usually 7.5% of copper to improve its hardness and utility. The corrosion is often that of the copper component, and is made of various oxides, carbonates, sulphides and so on.Pure silver in fact tarnishes less, though it does still attain a patina of oxide.
Does silver turn black in bleach?
Yes, silver can turn black when exposed to bleach due to a chemical reaction with sulfides present in the environment. This black tarnish can be removed using appropriate silver polish or cleaning methods.
What are the six classes of non silicates?
Carbonates- ex. Dolomite Halides- ex. Halite Native elements- ex. Silver Oxides- ex. Corundum Sulfates- ex. Gypsum Sulfides- ex. Galena
What are six classes of non silicates?
Carbonates- ex. Dolomite Halides- ex. Halite Native elements- ex. Silver Oxides- ex. Corundum Sulfates- ex. Gypsum Sulfides- ex. Galena
What are the six classes of non silicate minerals?
The six classes of non-silicate minerals are carbonates, sulfides, sulfates, halides, native elements, and oxides. Each class is defined by the chemical composition and structure of the minerals within that group.
What kind of elements are halides oxides sulfates sulfides carbonates and native elements?
These are types of chemical compounds. Halides contain halogen elements (e.g. chloride, fluoride), oxides contain oxygen, sulfates contain sulfate ions, sulfides contain sulfide ions, carbonates contain carbonate ions, and native elements are pure forms of elements (e.g. gold, silver).
What compound could be tarnish on a metal?
Tarnish on a metal could be caused by the formation of compounds such as oxides, sulfides, or chlorides. For example, silver tarnish is often silver sulfide (Ag2S), while copper tarnish is a mixture of copper oxides and sulfides. These compounds form on the surface of the metal in the presence of air and other chemicals.
Contrast the composition of minerals in each of the mineral groups?
silicates- silicon and oxygen carbonates- carbon, oxygen, and 1 or more other elements oxides- oxygen and 1 or more other elements( usually metal) sufates/sulfides- contain sulfur halides- halogen ion and 1 or more other elements native elements- group of minerals that exists in relatively pure form( ex: gold, silver, copper, sulfer, carbon...)
Which salts are insoluble?
- All carbonates (except ammonium, sodium & potassium carbonates) are insoluble - Lead, barium & calcium sulphates are insoluble - Lead & silver chlorides are insoluble
What are the different groups of minerals?
IMPORTANT!READ ALL INFORMATION FIRST!Elements: Many pure elements are found in the form of minerals in ores or mines. For example, uncombined carbon is often found in its pure state in the form of graphite or more rarely as diamond. Gold, silver and sulfur are other elements which are also found in its pure state. Even though these are pure elements they qualify to be known as minerals, but no chemical process is required on them further.Oxides: When an ore is found in which one or more elements are combined with oxygen, it is an oxide mineral. These may have chemical formulas of type XO (MgO, ZnO, CuO, etc.), X2O (Cu2O), X2O3 (Al2O3, Fe2O3), XO2 (MnO2, SnO2) and XY2O4 (MgAl2O4, FeCr2O4). The oxide minerals, are mostly of metallic elements. Example: hematite, magnetite, cuprite. Silicates and oxides are the most common types of minerals in volcanoes, especially after an eruption.Carbonates: The carbonate type of minerals are formed when a single carbonate ion (CO32-) reacts with a metal ion of complementing polarity. Example: siderite (FeCO3), smithsonite (ZnCO3), calcite (CaCO3). Carbonate minerals are used in making cement and other bonding material.Sulphates: The mineral class which includes the sulfate ion (SO42-) within its molecular structure, is categorized as sulphate mineral. Minerals like Gypsum (CaSO4·2H2O) and Barite (BaSO4) are examples of sulphate minerals.Organic Minerals: This class of minerals include biogenic substances, genesis or origin of which can be attributed to a geological processes. Organic minerals include all types of oxalates, mellitates, citrates, cyanates, acetates, formates, hydrocarbons, etc. Example of organic mineral includes whewellite, moolooite, mellite, fichtelite, carpathite, evenkite and abelsonite.
What are the eight groups of minerals?
Native Elements ~ copper, silver, gold, nickel-iron, graphite, diamondSulfides ~ sphalerite, chalcopyrite, galena, pyriteHalides ~ halite, fluoriteOxides & Hydroxides ~ corundum, hematiteNitrates, Carbonates, Borates ~ calcite, dolomite, malachiteSulfates, Chromates, Molybdates, Tungstates ~ celestite, barite, gypsumPhosphates, Arsenates, Vanadates ~ apatite, turquoiseSilicates ~ quartz, almandine garnet, topaz, jadeite, talc, biotite mica
What make silver lose its shiny?
Most silver objects of everyday use are in fact Sterling Silver, which contains usually 7.5% of copper to improve its hardness and utility. The corrosion is often that of the copper component, and is made of various oxides, carbonates, sulphides and so on.Pure silver in fact tarnishes less, though it does still attain a patina of oxide.
What is the black coating on silver metal?
It is silver oxides (Ag2O) or the rust of silver.
What are the 3 mineral groups?
Metallic Minerals (they were once refined and known as metals ex, gold, silver, copper, etc.) Fossil Fuels ( are used for energy production ex, coal, oil and gas) Industrial Minerals (everything else that is mined that is NOT metallic or a fossil fuel, many different types and uses, ex, asbestos)
