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Chemistry > Acids Alkalis And Salts > Flashcards

Acids Alkalis And Salts Flashcards

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0
Q

Use of universal indicator

A

Useful for testing a combination of dyes and presents to normal string of colours

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1
Q

Use of litmus paper

A

Test whether a solution is acidic or alkali
Red acidic
Purple neutral
Alkaline blue

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2
Q

Use of phenolphthalein

A

Used in titration
Change acidic to colourless
Change alkali to bright pink

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3
Q

Use of methyl orange

A

Changes acidic solutions red

Changes alkaline a yellow

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4
Q

Purpose of the pH scale

A

Goes from 0-14
Strongest alkali is 14
Strongest acid is 0
Neutral is 7

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5
Q

What are acids

A

A source of hydrogen ions (H+)

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6
Q

What are alkalis

A

Bases that can neutralise an acid
Have soluble bases
A source of hydroxide ions (OH-)

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7
Q

Predict the product if reactions between dilute hydrochloric acid and metal oxides

A

Hydrochloric acid + metal oxide➡️ metal chloride + water

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8
Q

Predict the product if reactions between hydrochloric acid and metal carbonate

A

Hydrochloric acid + metal carbonate ➡️ metal chloride + water + carbon dioxide

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9
Q

Predict the product if reactions between sulfuric acid and metal oxide

A

Sulfuric acid + metal oxide ➡️ metal sulfate + water

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10
Q

Predict the product of reactions between sulfuric acid and metal carbonate

A

Sulfuric acid + metal carbonate ➡️ metal sulphate + water + carbon dioxide

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11
Q

Predict the product of reactions between nitric acid metal oxide

A

Nitric acid + metal oxide ➡️ metal nitrate + water

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12
Q

Predict the product of reactions between nitric acid and metal carbonate

A

Nitric acid + metal carbonate ➡️ metal nitrate + water + carbon dioxide

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13
Q

Which Salts in general are soluble

A

Most chlorides
Most sulfates
Nitrates
Sodium, potassium, ammonium

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14
Q

Which salts are not soluble

A

Most carbonates

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15
Q

How to prepare soluble salts from acid

A

Acid and an insoluble base
Mix until the solid is dissolved, it had been neutralised when the excess sinks
Filter and evaporate it to get pure crystals

16
Q

How to prepare insoluble salts

A

Use precipitation reaction

Pick two solutions that contain the ions you want and mix

Chemistry (15 decks)

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