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Chemistry > 2.1.4 +2.1.5 Acids + Redox > Flashcards

2.1.4 +2.1.5 Acids + Redox Flashcards

1
Q

When an acid is added to 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 aceptor

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5
Q

What base is used to treat acid indigestion?

A

Magnesium hydroxide

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6
Q

What are alkali?

A

Bases that can dissolve in water to form aqueous hydroxide ions

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7
Q

What are atmospheric 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 acid reacts with a metal?

A

Salt and hydrogen

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13
Q

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

A

Both alkali 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

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

A

Acid red
base yellow,
endpoint orange

19
Q

What is an oxidation number?

A

The number of electrons in atom uses to bond with any other atom

20
Q

What is the oxidation number of an uncombined element such as C, H or O2?

A

0

21
Q

What is the oxidation number of combined oxygen such as in H2O?

A

-2

22
Q

What is the oxidation number of oxygen in peroxide?

A

-1

23
Q

What is the oxidation number of combined hydrogen such as in NH3 or H2S?

A

+1

24
Q

What is the oxidation number of combined hydrogen and metal hydroxide such as LiH?

A

-1

25
Q

What is the oxidation number of a simple ion?

A

Charge on the ion

26
Q

What is the oxidation number of combined fluorine such as in NaF or CaF2?

A

-1

27
Q

When an element has more than one stable oxidation number? How is it indicated?

A

Written as a Roman numeral

28
Q

What is the oxidation number of Fe in iron (III) chloride?

A

+3

29
Q

What are oxyanions?

A

Negative ions that have an element along with oxygen

30
Q

What is the oxidation number of SO4 -2?

A

+6

31
Q

Define oxidation in terms of electron transfer and oxidation number

A

Oxidation is
-loss of electrons
-an increase in oxidation number

32
Q

Define reduction in terms of electron transfer and oxidation number

A

Reduction is
-gain of electrons
-a decrease in oxidation number

33
Q

What is a redox reaction

A

A reaction in which both oxidation and reduction takes place

34
Q

What is the oxidation number of a metal?

A

0 because it is an uncombined element

Chemistry (7 decks)

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