Guide
1
order to properly write formulas that match hydroxide - acids and bases, you must have an idea of ​​the oxides.Oxides - are complex substances made up of two elements, one of which is oxygen.Hydroxides in its composition are also hydrogen atoms.Formula oxides is very easy to write using the simplified scheme.It's enough of a corresponding hydroxide "subtract" all water molecules, which are part of the hydroxide.If part of the acid or base is one molecule of water, it is necessary to reduce the number of hydrogen atoms 2 and oxygen atoms to 1. If a hydroxide composition comprises two water molecules, and the number of atoms of hydrogen and oxygen must be reduced to 4 and 2r
espectively.
2
H2SO4, sulfuric acid.Subtract 2 hydrogen atoms and one atom of oxygen - obtain SO3 or sulfur oxide (VI).
H2SO3, sulfurous acid.By analogy with the preceding example, the sulfur oxide SO2 or (IV).
H2CO3, carbonic acid.Production of CO2, carbon monoxide or (IV).
H2SiO3, silicic acid.Therefore, it turns SiO2 or silicon oxide.
Ca (OH) 2 calcium hydroxide.Subtract the water molecules and remain CaO or calcium oxide.
3
Some formulas hydroxide has an odd number of atoms of hydrogen, and therefore require a doubling.In addition, doubling the exposed and the other elements that make up the hydroxide, and then, by analogy, deducted all water molecules are formed.
NaOH, sodium hydroxide.Double the number of atoms of each element and get Na2O2H2.Subtract the water molecules and remain or sodium oxide Na2O.
Al (OH) 3, aluminum hydroxide.Double the number of atoms - Al2O6H6.Subtract formed three water molecules and will Al2O3, aluminum oxide.
4
HNO3, nitric acid.Double the amount of each element - get H2N2O6.Subtract from it and one water molecule will N2O5 - nitric oxide (V).
HNO2, nitrous acid.Make doubling the number of each item - get H2N2O4.Subtract from it and one water molecule will N2O3 - nitric oxide (III).
H3PO4, orthophosphoric acid.Double the amount of each element - get H6P2O8.Subtract from it three water molecules and will P2O5 - phosphorus oxide (V).
HMnO4, permanganic acid.Follow the doubling of the number of atoms and get H2Mn2O8.Subtract the water molecule (two hydrogen atoms and one oxygen atom), the result will be Mn2O7 - oxide, manganese (VII).