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Y1 Mchem S2 > Physical: Solubiltiy > Flashcards

Physical: Solubiltiy Flashcards

1
Q

A compound that dissolves in water is termed as

A

Soluble

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2
Q

A compound that does not dissolve in water is termed as

A

Insoluble

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3
Q

Definition of solubility, key words

A

The solubility of a solid in a solvent is the maximum mass that will dissolve in a given volume (or mass) of the solvent, or a particular temp., in the presence of excess dissolved solid to make the solution saturated

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4
Q

Chalk and limestone have a major constituent which can only dissolve to a small degree, what is it?

A

Calcium carbonate

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5
Q

What happens to the aqueous ions formed from Calcium carbonate

A

They are in equilibrium with the undissolved solid

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6
Q

Examples of calcium carbonate precipitates

A

Stalactites and Stalagmites

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7
Q

Lithium ion and Sodium ion

Generally soluble, True or False?

A

True, no exceptions

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8
Q

Potassium and ammonium ions are generally soluble, true or false?

A

True, no exceptions

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9
Q

Nitrate and acetate ions are generally soluble, true or false

A

True, no exceptions

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10
Q

Chlorine, bromine and iodine ions are generally soluble, true or False?

A

True, exception when mixed with Silver, mercury and lead ions

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11
Q

Sulfate is generally soluble, true or False?

A

True, except when mixed with strontium, barium, lead, silver and calcium ions

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12
Q

Solubility product constant has what unit

A

(Mol dm^-3)^(p+q)

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13
Q

Definition of molar solubility

A

The molar solubility (s) gives the number of moles of solute dissolved in 1 dm^3 of a saturated solution.

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14
Q

Definition of common ion effect?

A

The reduction in solubility of a salt due to the presence in solution of one of the ions from another source

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15
Q

Mg(OH)₂ (s) <> Mg²+ (aq) + 2OH` (aq)

Increasing the concentration of OH` will shift the EQM…

This will … the solubility of the solid

A

Left

Decrease

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16
Q

Mg(OH)₂ (s) <> Mg²+ (aq) + 2OH` (aq)

Increasing the concentration of H* will shift the EQM …

This will … the solubility of the solid

A

Right

Increase

17
Q

The value Q = Ksp applies only at…

A

Equilibrium

18
Q

If Q > ksp then the solution is …

A

Supersaturated and a solid precipitate will form

19
Q

If Q < Ksp then the solution is …

Where does the EQM move

A

Unsaturated

Right, meaning the solid can dissolve

20
Q

If Q = Ksp then the solution is …

A

Saturated, meaning the solution contains the equilibrium amounts and any addition solid will not dissolve

21
Q

If Q = Ksp will any additional solid be able to dissolve?

A

Yes

22
Q

If Q > Ksp what forms?

A

A solid precipitate

23
Q

If Q < Ksp can any solid dissolve?

A

Yes

Y1 Mchem S2 (3 decks)

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