Aluminum*)oxide is an amphoteric compound by being both 1. acidic and 2. alkaline
1. acidic
It will dissolve in hydroxide (an alkaline solution):
Al2O3 + 2OH- + 3H2O --> 2 Al(OH)4- aluminate anion
2. alkaline
It will dissolve in acidic H+ solution:
Al2O3 + 6H+ --> 2Al3+ + 3H2O
The amphoteric, neutral formula can be written as both Al2O3.(H2O)3 and: 2Al(OH)3
Added
(The same answer, but this time written without ions in solvent):
Aluminium*)oxide is amphoteric:
Al2O3(s) + 2NaOH(aq) + H2O(l) --> 2NaAl(OH)4(aq)
Aluminium oxide + sodium hydroxide + water --> sodium aluminate
Al2O3(s) + 6HCl(aq) --> 2AlCl3(aq) + 3H2O(l)
Aluminium oxide + hydrochloric acid --> aluminum chloride + water
*) The USA spells Al as aluminum; British Isles as aluminum. Both are correct.
There are a few amphoteric oxides.
Water (an oxide of hydrogen) is a prime example.
Aluminum oxide is also amphoteric.
They react with both acids and bases, i.e. they have both acidic and basic properties. An example is Al2O3.
amphoteric oxides are those who possess both acidic and basic properties
No, only aluminum oxide, lead oxide and zinc oxide are amphoteric oxides.
Gallium Oxide is an amphoteric Oxide because it is just below Aluminum in periodic table which also gives amphoteric oxide Regards: Engineer Ahmad
From the USDOT Pipeline and Hazardous Materials Safety Administration Glossary: A metal that is susceptible to corrosion in both acid and alkaline environments. Aluminum is an example of an amphoteric metal.
two of the reagents are aluminum hydroxide and zinc hydroxide.
AL3 plus and O2 negative will form Aluminum Oxide. It has many names such as corundum and alumina. It is an amphoteric oxide.
No, only aluminum oxide, lead oxide and zinc oxide are amphoteric oxides.
Amphoteric oxide.
Gallium Oxide is an amphoteric Oxide because it is just below Aluminum in periodic table which also gives amphoteric oxide Regards: Engineer Ahmad
It is amphoteric, meaning that it is both an acid and a base in different situations.
two of the reagents are aluminum hydroxide and zinc hydroxide.
From the USDOT Pipeline and Hazardous Materials Safety Administration Glossary: A metal that is susceptible to corrosion in both acid and alkaline environments. Aluminum is an example of an amphoteric metal.
Yes it is an amphoteric oxide as it has both basic oxide and acidic oxide properties.
These are called amphoteric. They can react and neutralise both acids and alkalis. Such examples include aluminum oxide, zinc oxide and beryllium oxide.
AL3 plus and O2 negative will form Aluminum Oxide. It has many names such as corundum and alumina. It is an amphoteric oxide.
Since aluminium oxide is an amphoteric oxide, it does react with the alkali sodium hydroxide in an aqueous medium. It is an acid base reaction.
Yes, beryllium oxide is amphoteric because can be dissolved by acids and bases..
Steps to take: Write the chemical formula : Al2O3 Calculate the number of moles for aluminum oxide. You should know the formula which is the mass given (0.051g) divided by the Mass of aluminum oxide. Since there is '2' moles of Aluminium you multiplly the number of moles calculated for aluminum oxide by 2. Then you have calculated the number of Ions.