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Chemistry OCR A Level > 2.1.4 > Flashcards

2.1.4 Flashcards

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1
Q

When an acid is added to the water what ion is released into the solution?

A

Hydrogen ion, H+

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2
Q

Define acid

A

Proton donor

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3
Q

Describe the dissociation of a strong acid

A

Full dissociation

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4
Q

Define base

A

Proton acceptor

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5
Q

Which is used to treat acid indigestion?

A

Magnesium hydroxide

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6
Q

What are alkalis?

A

Bases that can dissolve in water to form aqueous hydroxide ions

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7
Q

What are amphoteric substances?

A

Substances that can act as acids and bases

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8
Q

What is formed when acid reacts with carbonate?

A

Salt, carbon dioxide and water

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9
Q

What is a salt?

A

A compound that is formed when H+ of an ion is replaced by a metal ion or positive ion

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10
Q

What is formed when acids react with metal oxides?

A

Salt and water

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11
Q

What is formed when acid reacts with alkali?

A

Salt and water

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12
Q

What is formed when acids react with metal?

A

Salt and hydrogen

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13
Q

Why are the products the same when acids react with alkali or metal oxides?

A

Both alkalis and metal oxides are types of bases

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14
Q

How are ammonium salts formed?

A

When acid reacts with aqueous ammonia

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15
Q

What are hydrated crystals?

A

A crystalline structure containing water

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16
Q

What does anhydrous crystals mean?

A

Crystalline form that contains no water

17
Q

What does a dot formula indicate?

A

The amount of water present in a crystalline structure

18
Q

Write down the methods to carry out a titration

A

1 Using a pipette, measure the volume of a solution
2 Add the solution into a conical flask and add an indicator into it
3 Add the other solution into the burette and record the volume
4 Slowly add the solution in the burette into the conical flask
5 Swirl the mixture continuously until the end point is reached
6 Repeat until concordant results are obtained

19
Q

What is the colour of methyl orange in acid, base and at end point?

A

Acid - Red
Base - Yellow
End Point - Orange

Chemistry OCR A Level (7 decks)

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