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NCEA Science, level 1 > Acids & Bases; The Basics > Flashcards

Acids & Bases; The Basics Flashcards

1
Q

What are the products of this reaction?

Carbonate + acid →

A

Salt + water + carbon dioxide

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2
Q

What are the products of this reaction?

Hydrogen carbonate + acid →

A

Salt + water + carbon dioxide

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3
Q

What is the difference between a base and an alkalis?

How are alkalis

A

A base that dissolves in water is an alkalis

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4
Q

What is the pH of Alkali solutions?

A

pH > 7

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5
Q

Which ion do Alkalis solutions have?

A

Hydroxide ion, OH-

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6
Q

What is an acid?

A

Those substances which contain one or more Hydroide ions, H+. They release H+ when dissolved in water.

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7
Q

What is a Base?

A

A substance that react with solutions containing Hydrogen ions

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8
Q

What is an Alkali?

A

A Base that can be dissolved in water.

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9
Q

What pH range would you expect a weak alkali to be in?

A

pH 10 - 11

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10
Q

What pH range would you expect a strong alkali to be in?

A

PpH 13 - 14

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11
Q

Name a Base

A

ZnO, CaO, Cu(OH)2

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12
Q

What is the pH scale used to measure?

A

The relative acidity or alkalinity of a solution

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13
Q

What is the numeric range of the pH scale?

A

0 - 14

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14
Q

How would you describe a solution with a pH of 2?

A

Strong acid

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15
Q

How would you describe a solution with a pH of 4?

A

Weak acid

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16
Q

How would you describe a solution with a pH of 8?

A

Weak alkali

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17
Q

How would you describe a solution with a pH of 13?

A

Strong alkali

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18
Q

How would you describe a solution with a pH of 7?

A

Neutral

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19
Q

What is neutralisation?

A

The mixing of an acid and alkali (or visa versa) until the solution becomes neutral i.e. has pH of 7.

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20
Q

List four properties of Acids

A

pH of < 7

Taste sour

Are corrosive

Contain Hyrogen ions, H+

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21
Q

What are the products of this reactions?

acid + metal →

A

Salt + hydrogen

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22
Q

What are the products of this reactions?

acid + base →

A

Salt + water

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23
Q

What gas is present when we hear a pop or squeak when a lit splint is ignites gas in a test tude?

A

Hydrogen, H+

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24
Q

What gas is present when lime water turns cloudy as the gas passes through it?

A

Carbon dioxide, CO2

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25
What gas is present when a glowing splint reignites when put into a test tude?
Oxygen, O2
26
How many protons does Aluminium have?
13
27
How many neutrons does Aluminium have?
14
28
What are indicators used for in Chemistry?
Test solutions to show if they are acidic, neutral or alkaline
29
What colour is Red Litmus go when testing an acid?
Red
30
What colour is Red Litmus go when testing an alkali?
Blue
31
What colour is Blue Litmus go when testing an acid?
Red
32
What colour is Blue Litmus go when testing an alkali?
Blue
33
What colour is Red Litmus go when testing a neutral solution?
Red
34
What colour is Blue Litmus go when testing a neutral solution?
Blue
35
What is the colour range of Universal Indicators?
Red for acid through to Purple for Alkali
36
What are all metal oxide and metal hydroxides?
They are all Bases
37
What is the chemical formula for Hydrochloric acid?
HCl
38
What is the chemical formula for Sulfuric Acid?
H2SO4
39
What is the chemical formula for nitric acid?
HNO3
40
What is the chemical formula for zinc sulfate?
ZnSO4
41
What is the chemical formula for water?
H2O
42
What is the chemical formula for sodium carbonate?
NaHCO3
43
What is the chemical formula for copper hydroxide?
Cu(OH)2
44
What is the chemical formula for aluminium oxide?
Al2O3
45
What is the chemical formula for carbon dioxide?
CO2
46
What an OH- ion?
Hydroxide ion
47
What is a HCO3- ion?
Hydrogen carbonate ion
48
What is a NO3- ion?
Nitrate ion
49
What is a SO42- ion?
Sulfate ion
50
What must be remembered about charges when writing the formula for a substance?
+ charges must equal - charges
51
Explain why alkalis are a subset of Bases?
Alkalis are made of those Bases which are soluble in water.
52
What numbers must be the same of each side of a chemical equation?
The number of atoms
53
How can you increase the number of atoms when balancing an equation?
By putting a number in front of the reactant or product.
54
What are reactants?
Substances that are brought together to create a chemical reaction.
55
What are products?
Substances formed by a chemical reaction.
56
What must never be changed in chemical reactions?
The formulae of the reactants or products.
57
What is the colour of the metals on this Periodic table?
Teal / Blue
58
What is the colour of the non-metals on this Periodic table?
Coral / Pink
59
What name/s do we used for the yellow elements on this Periodic table?
Metalloids or semimetals
60
What are the product of this reaction? carbonate + acid →
Salt + water + carbon dioxide
61
What are the products of this reaction? hydrogen carbonate + acid →
Salt + water + Carbon dioxide
62
When this reaction, hydrogen carbonate + acid → , occurs how can you tell a gas is produced?
There is a fizz, gas bubbles can be seen in the liquid.
63
What needs to be present along with Bicarbonate of Soda (Baking soda) for the Baking to rise?
An acid
64
How many Groups are there in the Periodic table?
18
65
What do elements in the same Group have in common?
Similar configurations of electrons in their valence (outermost) shell.
66
What is a mixture?
A substance where two or more element or compounds are combined physically but not chemically bonded to each other.

NCEA Science, level 1 (7 decks)

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