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Chemistry and Physics > Acids And Bases > Flashcards

Acids And Bases Flashcards

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1
Q

Name 2 everyday examples and 2 chemical examples of acids

A 
Lemon juice and yoghurt. 
Hydrochloride acid (HCL) and Sulfuric Acid (H2SO4)
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2
Q

Name 3 characteristics of a base

A

1) turns red litmus paper blue
2) have pH level of 8 or more
3) many are dangerous

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3
Q

What is an alkali?

A

Bases dissolved in water.

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4
Q

Name 2 examples of everyday and 2 examples of chemical bases

A

Toothpaste and bleach

Hydroxide (NaOh) and calcium carbonate (CaCo3)

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5
Q

Name 3 characteristics of an acid

A

1) sour taste
2) blue litmus paper turns red
3) have a ph of 6 or below

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6
Q

Give me an example of an indicator

A

Litmus paper

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7
Q

State the colour change of red litmus and blue litmus paper when acids and bases are present

A

Red - red = acid
Red - blue = base
Blue - blue = base
Blue - red = acid

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8
Q

What is the ph scale?

A

It indicates the acidity or basic it’s of a solution.

It runs from 0-14

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9
Q

On the ph scale if it is
• greater than 7
• less than 6
•7

A

Base
Acid
Neutral

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10
Q

How are acids neutralised

A

By a base,

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11
Q

What do acids and bases produce when neutralised

A

Water and salt

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12
Q

Give me an example of a base neutralising an acid

A

Hydrochloride acid + sodium hydroxide = sodium chloride(salt) + water

(HCL) + (NaOH) = NaCl + H20

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13
Q

What other way can acids be neutralised

A

By reacting them with carbonates( also bases)

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14
Q

In method , what is produced

A

Carbon dioxide

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15
Q

Give me an example of method 2 in neutralisation

A

Hydrochloride acid + Calcium carbonate = calcium chloride + carbon dioxide + water

(2HCL) + (CaCO3) = CaCl2 + CO2 + H20

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16
Q

What is titration

A

To find the exact amount of acid required to just neutralise a certain volume of base

17
Q

When acids and metals react what do they produce

A

Salt and hydrogen

18
Q

Give me an example of when metals and acids reac

A

Zinc + hydrochloride acid = zinc chloride + hydrogen

Zn + 2HCL = ZNCL2 + H2

Chemistry and Physics (21 decks)

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