Chapter 5 Acid, Base s And Salt Flashcards

1
Q

How can u obtain salt from a simple sample sea water

A

Evaporation the water apply heart to the dish and cool it and crystallize it remains with dry salt

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2
Q

What is the solution which gives a red brown ppt

A

Iron III

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3
Q

How can you distinguish between a strong and weak acid

A

Strong acid dissociate completely while a weak acid dissociates partially

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4
Q

How can u know if substance A was and acid or not

A

Buy using a litmus paper
Red or blue

Where red litmus paper when dipped in an acid remains red

Blue turns red when dipped in an acid

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5
Q

Sodium chloride likely to have what ph

A

7

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6
Q

Name a salt that can be obtained from a metal and a dilute acid

A

Zinc sulphate

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7
Q

Element which has green crystals

A

Iron sulphate

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8
Q

Sodium hydroxide can react with a certain acid oxide to produce a salt called sodium sulphate name the acid oxide used

A

Sulphuric acid

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9
Q

What can you see when little copper II oxide warmed with dilute nitrate acid

A

Crystalline solids are formed in a solution

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10
Q

Hydrochloric acid likely to have what ph

A

2

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11
Q

What’s an acid

A

A substance which produces hydrogen ions as the only positively ions when dissolved in water

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12
Q

Name a molecule with a colorless liquid

A

Water

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13
Q

What is used to measure the acidity or alkalinity of a substance

A

Ph meter

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14
Q

When copper II oxide reacts with dilute nitrite acid how does copper II OXIDE behave

A

It behaves as a base which neutralize an acid

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15
Q

Which ion is responsible for acidity

A

Hydrogen

H+

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16
Q

What solution has a green ppt

17
Q

Acids have a sour taste what ion is responsible for this taste

A

Hydrogen H+

18
Q

A first aid kit manual suggest that vinegar should be used to treat wasp sting and baking powered for bee sting

What’s the chemical nature for wasp stings

A

The wasp stings are alkaline therefore an acid will act on the wasp to neutralize the wasp stings

19
Q

What is neutralization reaction

A

It’s a reaction in which a base react with an acid to form salt and water

20
Q

State an ion responsible for alkalinity of a solution

A

The hydroxide ion H-

Oxides ion

21
Q

Which solution has a white ppt

22
Q

Why hydrogen chloride has no effect on a dry blue litmus paper

A

Because hydrogen chloride is a neutral salt

23
Q

If We had no baking powered in the house what can we use to treat bee stings

A

Toothpaste

24
Q

What happens when we mix a base and acid

A

Naturalization occur

25
What's common name for sodium hydrogen carbonate
Baking soda
26
Small amount of baking soda was added effervescence occurred Producing a gas name gas produced
Carbon dioxide
27
What's a salt
It is a compound formed when hydrogen ions in an acid are replaced by a metal ions
28
What's a normal salt
A salt which contains no replaceable hydrogen
29
How can u obtain pure salt of iron II sulphate from its crystal solution
Heat solution gently to concentrate it Filter colorless crystalline And recrystallize them Filter off excess liquid Let crystal dry Pure iron sulphate is formed
30
Name the reactant that produce zinc chloride
Hydrochloric acid and zinc hydroxide
31
When the oxide and hydrogen are equal then it's said to be
Neutral
32
How can you obtain zinc chloride crystals from the solution of water and zinc chloride
By putting it in evaporating dish and leave pure crystal called zinc chloride