Solubility of Group 2 Compounds: Hydroxides & Sulfates Flashcards

1
Q

Group 2 hydroxides

Going down the group, the solutions formed from the reaction of group 2 oxides with water become more

A

alkaline

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2
Q

When the oxides are dissolved in water, the following ionic reaction takes place:

A

O2- (aq) + H2O (l) → 2OH- (aq)

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3
Q

The higher the concentration of OH- ions formed, the more

A

alkaline the solution

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4
Q

The alkalinity of the solution formed can therefore be explained by the solubility of the Group 2 hydroxides

The hydroxides dissolve in water as follows:

A

X(OH)2 (aq) → X2+ (aq) + 2OH- (aq)

Where X is the Group 2 element

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5
Q

When the metal oxides react with water, a group 2 ……. id formed

A

group 2 Hydroxide

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6
Q

Going down the group, the solubility of these hydroxides

This means that the concentration of OH- ions…….

A

increases

This means that the concentration of OH- ions increases, increasing the pH of the solution

As a result, going down the group, the alkalinity of the solution formed increases when Group 2 oxides react with water

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7
Q

solubility meaning

A

is the maximum concentration of solute (a substance that dissolves in a solvent) that can be dissolved in the solvent (dissolver).

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8
Q

Going down the group, the solubility of the hydroxides increases which means that the solutions formed from the reactions of the group 2 metal oxides and water become more

A

alkaline going down the group

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