Period 3 Oxides Flashcards by Ailbhe Sweeney | Brainscape

Q

Na2O reaction with water

A

Na2O + H2O = 2NaOH
Dissolves then reacts with water to form solution
pH 14

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Q

Na2O reaction with acid and nature

A

Na2O + 2H+ = 2Na+ + H2O

Basic

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Q

MgO reaction with water

A

Slightly soluble
forms Mg(OH)2
pH10

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Q

MgO reaction with acid

A

MgO + 2H+ = Mg2+ + H2O

Basic

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Q

Al2O3 reaction with water

A

Insoluble due to very high lattice enthalpy

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Q

Al2O3 reaction with acid

A

Al2O3 + 6H+ = 2Al3+ + 3H2O

Amphoteric

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Q

Al2O3 reaction with alkali’s

A

Al3O2 + 2OH- + 3H2O = 2Al(OH)4

Amphoteric

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Q

Definition of amphoteric

A

When a substance acts as both a base and an acid

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Q

SiO2 reaction with water

A

Insoluble due to strong covalent bonds

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Q

SiO2 reaction with alkali’s

A

SiO2 + 2OH- = SiO3 2- + H2O

Must be concentrated and hot NaOH

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Q

P4O10 reaction with water

A

P4O10 + 6H2O = 4H3PO4
React violently
pH 0

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Q

P4O10 reaction with alkali’s

A

P4O10 + 12OH- = 4PO3 2- + 6H2O

Acidic

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Q

SO2 reaction with water

A

SO2 + H2O = H2SO3
Dissolves
pH 3

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Q

SO2 reaction with alkali’s

A

SO2 + 2OH- = SO4 2- + H2O

Acidic

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Q

SO3 reaction with water

A

SO3 + H2O = H2SO4
Reacts violently
pH 0

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Q

SO3 reaction with alkali’s

A

SO3 + 2OH- = SO4 2- + H2O

Acidic