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Chemistry > C8 acids, bases and salts > Flashcards

C8 acids, bases and salts Flashcards

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1
Q

Result of flame test on potassium ions

A

Lilac flame

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2
Q

Define acids and bases in terms of proton transfer

A

acids and proton donors, bases are proton acceptorns.

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3
Q

Result of flame test on sodium ions

A

Yellow flame

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4
Q

Test for CO2 gas

A

Bubble the gas through lime water
It will turn cloudy if co2 is present

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5
Q

Test for hydrogen gas

A

Insert a burning splint into a test tube of gas. If H2O is present, a squeak pop sound will be heard

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6
Q

Test for oxygen gas

A

Insert a glowing splint into a test tube of gas. If oxygen is present, splint will relight

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7
Q

Test for sulfite ions

A

Potassium magnate should change fdom purple to colorless

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8
Q

What reactants can be used to form salt magnesium nitrate

A

Magnesium nitric acid

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9
Q

A method used ro produce sodium sulfate from sodium hydroxide and hcl

A

Titration

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10
Q

Test for carbonate ions

A

Add limewater to test tube. If the carbonate is there then it will turn cloudy

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11
Q

Flame test on copper ions

A

Blue-green flame

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12
Q

What color ppt is formed when silver nitrate is added to a chloride solution

A

White

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13
Q

What color ppt when silver nitrate is added to iodide solution

A

Yellow ppt

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14
Q

What color ppt is frmed when silver nitrate is added to bromide solution

A

Cream ppt

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15
Q

What color ppt is formed when sodium hydroxide reacts with calcium ions

A

White ppt

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16
Q

What color ppt forms when sodium hydroxide reacts with chromium ions

A

Green

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17
Q

What color ppt forms when sodium hydroxide reacts with iron(ll) ions?

A

Green

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18
Q

Flame test on lithium ions

A

Crimson

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19
Q

Products when acid reacts with a metal

A

Acid+metal>salt+hydrogen

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20
Q

Products when acid reacts with a metal hydroxide

A

Salt and water

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21
Q

What are the products when an acid reacts with a metal carbonate

A

Salt, water and hydrogen

22
Q

Observation when ammonia reacts with zinc ions

A

White ppt at first
Then redissolves in excess ammonia

23
Q

Observation when ammonia reacts with calcium ions

A

No observations

24
Q

Observations when ammonia reacts with aluminium ions

A

White ppt forms

25
Q

What color ppt forms when sodium hydroxide recats with zinc ions

A

White ppt at first
Then it dissolves to colorless

26
Q

Ppt color when sodium hydroxide reacts with iron ions

A

Brown

27
Q

Test for sulfur dioxide

A

Add potassium manganate, color will change from lilac to blue

28
Q

Reactants of acids with a metal oxide

A

Salt and water

29
Q

Name of salt formed from magnesium and sulfuric acid

A

Magnesium sulfate

30
Q

What is an amphoteric oxide

A

Metal oxides that cab neutralise both bases and acud to form salt and water

31
Q

Why is it important to control acidity in soil

A

Crops wont grow

32
Q

What do bases produce in an aqueous solution

A

OH+ ions

33
Q

How is Ph measured

A

Universal indicator

34
Q

Difference between strong and weak base

A

Strong bases-completely ionised in aq solutions
Weak bases- partially ionised in aq solutions

35
Q

Test for ammonia gas

A

Amonnia gas will turn damp litmus paper blue

36
Q

What color is blue litmus paper in acid and alkali

A

Acid : turns red
Alkali : stays blue

37
Q

What color is red litmus paper in acid and base

A

Base-turns red
Acid-stays red

38
Q

What color is methyl orange in acid and base

A

Acid - red
Base - yellow

39
Q

What color ppt forms when sodium hydroxide reacts with chromium ions

A

Green

40
Q

Neutral oxide

A

Some non metallic oxides are neutral. They can’t neutralise acids or bases

41
Q

How is a basic oxide formed

A

When metal reacts with oxygen

42
Q

Difference between strong and weak acid

A

Strong acids are completely ionised in aq solutions

Weak acids are only partially ionised in aq solutions

43
Q

Name of salt formed from zinc oxide and nitric acid

A

Zinc nitrate

44
Q

What do acids produce in an aq solutions

A

H+ ions

45
Q

How is an acidic oxide formed

A

When non metals react with oxygen

46
Q

Test for chlorine gas

A

Damp liumus paper turns red before being bleached white

47
Q

How is the reactivity of acidity and basic of a solution quantified

A

Using the pH scale

48
Q

Name of salt formed from calcium carbonate and hydrochloric acid

A

Calcium chloride

49
Q

What color ppt forms when sodium hydroxide reacts with copper ions

A

Blue

50
Q

What color ppt forms when sodium hydroxide reacts with aluminium ions

A

White ppt first then into colourless

Chemistry (14 decks)

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