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How to find wich oxide is nuteral?

How to find wich oxide is nuteral?

Grade:11

5 Answers

Aarti Gupta
askIITians Faculty 300 Points
7 years ago
Oxides are those chemical compounds in which one or more oxygenatoms combined with another element for e.g. Li2O.These are of different types like acidic,basic,amphoteric and neutral.Neutral oxides are those oxides which show neither basic nor acidic properties when they react with water.For e.g carbon monoxide (CO) and nitrous oxide (N2O) which are only slightly soluble in water, and nitric oxide (NO) which is appreciably soluble in cold water.These oxides are oxygen poor compounds of non-metals.Such oxides do not form salts when react with acids or bases.Thus we can say that when oxide neither reacts with acid or base,such oxides are called neutral oxides,
Vineeth
19 Points
7 years ago
I asking by viewing periodic table , which elements oxide is nuteral. The pattern I want?
Aarti Gupta
askIITians Faculty 300 Points
7 years ago
By viewing the periodic table,one can predict the nature of oxides.Acidic,basic,neutral oxides show following trends-
In general, the electropositive character of the oxide's central atom will determine whether the oxide will be acidic or basicIt is found that more electropositive the central atom the more basic the oxide and more electronegative the central atom, the more acidic the oxide. Electropositive character increases from right to left across the periodic table and increases down the column.
There are three non-metal oxides from the upper right portion of the periodic table, CO, NO, and N2O, which have such low oxidation numbers for the central atom that they give neutral aqueous solutions.Such oxides are neutral oxides.
Aluminium and zinc oxides are amphoteric as they show both acidic as well as basic character.
Vineeth
19 Points
7 years ago
Ok , you are correct is there any fixed part in the periodic table , where the element combines with oxygen and form nuteral oxide. From my guess the most probably from your answer above the d – block elemens oxide should show the basic character. But oxides of p-block are showing neutral behaviour, Why?
Aarti Gupta
askIITians Faculty 300 Points
6 years ago
In the periodic table as you know metals are placed on left and non-metals on right.Metals show electropositive character while non metals are electronegative in character.As explained above more electropositive the central atom,oxide will be more basic and more electronegative the central atom the oxide will be more acidic.So metal oxides are basic and non metals are acidic in nature.A resultant borderline between basic and acidic oxides occurs along a diagonal.
In case of d-block elements they exhibit variety of oxidation numbers.They may have one or more oxides that show only basic properties and one or more oxides that show only acidic properties.Higher the oxidation no. more acidic will be the oxide.For ex- CrO3 is acidic,Cr2O3 is amphoteric and CrO is basic in nature as oxidation no. of Cr is +6,+3 and +2 respectively.

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