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Nuetrik [128]
3 years ago
8

Molar mass of a compound containing Al3+ ion and OH- ion?

Chemistry
1 answer:
Sedbober [7]3 years ago
5 0

Answer: The molar mass of a compound containing Al^{3+} ion and OH^- ion is 78 g/mol

Explanation:

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Here aluminium has an oxidation state of +3 called as Al^{3+} cation and OH^{-} is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral Al(OH)_3

Molar mass is defined as the mass in grams of 1 mole of a substance.

Atomic Mass of Aluminium (Al) = 27 g

Atomic Mass of Oxygen (O) = 16 g

Atomic Mass of Hydrogen (H) = 1 g

Molecular mass of  Al(OH)_3 = 27+3(16)+3(1) g = 78 g

Thus molar mass of a compound containing Al^{3+} ion and OH^- ion is 78 g/mol

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