Dec
18
Zinc oxide is basic because it has a lone pair of electrons on oxygen that can easily bond with a proton:
ZnO: + H+ –> [ZnO-H+]
Oxides like silicon dioxide and nitrogen oxide are also basic for the same reason as ZnO. As a matter of fact one of the best ways of cleaning glass is with a base bath, but it leaves the glass very basic (a lot of [K2SiO2]).
So if you want a ion free reaction (and product), you must first re-acidify the glassware with an acid rinse – (usually dilute H2SO4), and then rinse the glassware thoroughly with water until neutral.
Tags: Basic, Nitrogen, Oxide, Oxides, Said, Silicon, type, What, zinc
metal oxides are basic ; gives OH- when dissociated in water.
XO + H2O ——> XOH—-> X+ + OH-
nonmetals oxides are acidic gives H+ when dissociated in water
EO + H2O —–> HEO—-> H+ + EO-
metallodis are amphotric behave as acids an bases at the same time.
as we proceeds from left to right in the periodic table basisity of element oxides decreases and acidity increases.
so silicon oxide is amphotric ,nitrogen oxide is acidic.
Metal oxides are said to be basic because in reaction with water form bases. Nonmetal oxides are said to be acidic because in reaction with water form acids. After that, it was discovered that not all oxides react with water, but the name remained, so now the definition of basic oxides is the metal oxide, no matter if it reacts or not with water. The same for acidic oxides.
That’s why zinc oxide is said to be basic.
Silicon is a metalloid but it’s often considered to be a nonmetal. So silicon oxide is acidic and nitrogen monoxide too.
Observation: Silicon oxide is one of the oxides that don’t react with water. It’s also called sand…You know that no matter how much sand you will put into water, it won’t even dissolve. Nitrogen monoxide is also one of these exceptions, the only nitrogen oxides that react with water being N2O3 and N2O5, that form nitrous and nitric acid.
Hope I answered your questions!
Louise
there are 4 main types of oxide
1) Acidic oxides
2) Basic oxides
3) Neutral Oxides
4) Amphoteric Oxides
1) these are oxides that dissolve in water to form an acidic solution, usually formed between a NON-METAL AND OXYGEN(EXCEPTION OF GROUP 4 ATOMS).E.g : SO4, NO2
2)These are oxides that dissolve in water to form a basic solution, usually formed btw A METAL AND OXYGEN(EXCEPTION OF GROUP 4 ATOMS).E.g Zinc oxide, sodium oxide…..etc
3)these are oxides which which have no effect on water.there are very few examples of such oxides: CO(carbon monoxide), NO(nitrogen monoxide)…etc
4) these are oxides which react with both acids and alkali’s(not bases). Eg: Al2O3
Although, SiO2 is an ACIDIC OXIDE,it doesn’t dissolve in water to form an acidic solution, but reacts with CONCENTRATED ALKALI’S(at high temperatures) to form a neutralization reaction.