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Chemistry > Salts Preparation > Flashcards

Salts Preparation Flashcards

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1
Q

Give 4 soluble salts with no exceptions

A

Sodium
Potassium
Ammonium
Nitrates

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2
Q

Are chlorides soluble or insoluble

A

Soluble

EXCEPT SILVER OR LEAD CHLORIDE

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3
Q

Are sulphates soluble or insoluble

A

Soluble

EXCEPT

BARIUM sulfate
CALCIUM sulfate
LEAD sulfate

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4
Q

Give two insoluble salts and their exceptions

A

Carbonates - Except
Sodium
Potassium
Ammonium

Hydroxides - Except
Sodium
Potassium
Ammonium
Calcium
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5
Q

How do you make lead iodide

A

15cm3 of potassium iodide in a beaker
15cm3 of nitrate solution in too.
It will turn yellow
Filter into a conical flask
Wash the lead iodide off with distilled water
Place funnel in boiling tube and add hot water
Place boiling tube in hot water bath

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6
Q

How do you find n in the water crystallisation formulae questions

A

Mass
———- Do this to both substances and then find the simplest ratio
mr

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7
Q

What method do you use if the salt is insoluble

A

Precipitation method

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8
Q

What method do you use if the salt is soluble and is NOT a Sodium
Potassium
Ammonium salt

A

Excess solid method

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9
Q

What method do you use if the salt is soluble and IS a Sodium
Potassium
Ammonium salt

A

Titration method

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10
Q

Give the solubility equation for the precipitation method

A

aq + aq = aq + S

aq = soluble
S = insoluble
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11
Q

Give the solubility equation for the excess solid method method

A

aq + S = aq + S

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12
Q

Give the solubility equation for the Titration method

A

aq + aq = aq + aq

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13
Q

Describe the excess solid method (7)

A

1) Heat acid in a beaker
2) Add base until excess and stir with glass rod
3) Filter the mixture using filter paper and funnel
4) Heat the filtered solution until a hot saturated solution forms
5) Allow solution to cool so that hydrated crystals form
6) Remove the crystals by filtration and wash with distilled water
7) Dry by leaving them in a warm place

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14
Q

Describe the Precipitation method (4)

A 
Mix the two salts together in a beaker
Stir with glass rod
Filter using filter paper and funnel
Wash
Dry by leaving a warm place
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15
Q

Describe the Titration method (8)

A

1) Pipette 25cm3 of alkali into a conical flask
2) Do not add indicator
3) Titrate the known volume acid into conical flask containing alkali
4) Transfer to an evaporating basin
5) Heat the solution until a hot saturated solution forms
6) Allow the solution to col so that hydrated crystals form
7) Remove crystals by filtration and wash
8) Dry by leaving in a warm place

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Chemistry (20 decks)

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