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Chemistry > Topic 3 > Flashcards

Topic 3 Flashcards

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1
Q

What do acids produce in aqueous solutions?

A

H+ Ions

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2
Q

What do alkalis produce in aqueous solutions?

A

OH- ions

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3
Q

What colour does phenolphthalein turn when in an acidic or alkaline solution

A

Acidic = colourless ( never clear right clear in exam )

Alkaline = pink

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4
Q

What colour does methyl orange turn what in an acidic or alkaline solution?

A

Acidic = red

Alkaline = yellow

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5
Q

When the H+ concentration in a solution increases by a factor of 10 how many units has it increased by ?

A

1 unit

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6
Q

What does concentrated mean ?

A

Larger amount of the substance in a given volume of a solution

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7
Q

What does dilute mean ?

A

Lesser amount of a substance in a given volume of a solution

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8
Q

What is a strong acid ?

A

fully dissociates in aqueous solution

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9
Q

What is a weak acid ?

A

An acid that partially dissociates in aqueous solution

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10
Q

What does acid + base form ?

A

Acid + base -> salt + water

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11
Q

What does an acid + metal form ?

A

Acid + metal -> salt + hydrogen gas

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12
Q

What does an acid + metal oxide form?

A

Acid + metal oxide -> salt + water

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13
Q

What does an acid + metal hydroxide form?

A

Acid + metal hydroxide -> salt + water

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14
Q

What does an acid + metal carbonate form?

A

Acid + metal carbonate-> salt + water + carbon dioxide

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15
Q

What is the test for hydrogen?

A

Use a burning splint held at the opening of a test tube if a squeaky pop is produced then hydrogen is present

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16
Q

What is the test for carbon dioxide?

A

Bubble the gas through limewater and if the gas is carbon dioxide then the solution with turn cloudy

17
Q

What is the ionic equation for neutralisation?

A

H+(aq) + OH-(aq) -> H20(l)

18
Q

Why is excess of the reactant added ?

A

To ensure the volume of acid reacts completely

19
Q

How is excess reactant removed?

A

By filtering the insoluble reactant so you are left with salt and water

Chemistry (2 decks)

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