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Thermal stability of group 2 carbonates?
Carbonates are decomposed by heating in oxides and carbon dioxide; the temperatures of decomposition are: - Beryllium carbonate: decomposed at room temperature. - Magnesium carbonate: 400 0C - Calcium carbonate: 900 0C - Strontium carbonate: 1 280 0C - Barium carbonate: 1 360 0C - Radium carbonate: I have not yet found data.
What do carbonates become more stable to thermal decomposition as they go down group 2?
The size of the group 2 ions gets bigger as we go down the group. Hence, their polarising power also decreases. So, the carbonates are less polarised as we go down the group, requiring more energy to decompose them. Polarising power is the ability of the ion to attract the bonding pair of electrons towards itself.
What specific reagent precipitates the cations of group 2?
Ammonium carbonate ((NH4)2CO3) is a specific reagent that precipitates the cations of group 2 in qualitative analysis. It forms insoluble carbonates with cations such as calcium, strontium, and barium, allowing for their separation from other cations in the group.
What chemical classification does dolomite go to?
The chemical classification group that dolomite belongs to is a carbonate. Dolomite is an element of calcium magnesium carbonate and has the chemical formula CaMg(CO3)2.
How might cations in group 1 be separated from cations in group 2?
If your Group 2 cations are calcium, strontium or barium, add a solution containing sulphate ions, i.e. sulphuric acid or the sulphate of the Group I metal that is the Group I cations in your solution. The Group 2 cations will precipitate out with the sulphate ions. If you have beryllium or magnesium cations, then I don't know.
What 2 elements make water hard?
magnesium and calcium.
What is a mineral carbonate?
A mineral carbonate is a compound containing the carbonate ion (CO3^2-). Examples include minerals such as calcite (CaCO3) and dolomite (CaMg(CO3)2). Carbonates are common minerals in Earth's crust and play a key role in rock formation.
What is the difference between Carbonates and Hydroxides?
Carbonates are compounds that contain the carbonate ion (CO3^2-) and are formed by the reaction of carbon dioxide with a base. Hydroxides are compounds that contain the hydroxide ion (OH-) and are formed by the reaction of a metal with water. Carbonates are typically insoluble in water, while hydroxides are usually soluble.
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.
Does a base react with carbonates?
Yes, bases can react with carbonates to form water, carbon dioxide, and a salt. The reaction typically involves the base accepting a proton from the carbonate ion, leading to the formation of carbon dioxide gas.
How is calcium carbonates formed?
It's a 2 step reaction. CaCO3 is the Calcium Carbonate: CaO + H2O → Ca(OH)2Ca(OH)2 + CO2 → CaCO3 + H2O
Why group 1 and group 2 elements do not occur free in nature?
Group 1 and group 2 elements are reactive metals and react readily with water. They also react readily at high temperatures with oxygen. Over the millenia any free deposits would react to form compounds.
