Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > C5: Chemical Changes > Flashcards

C5: Chemical Changes Flashcards

1
Q

What are the two products formed when a metal reacts with water

A

Hydroxide and hydrogen

metal + water = metal hydroxide + hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What can we say

A

The more reactive the metal, the more rapid the reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What happens when a metal reacts with a dilute acid. Give the equation and the two products formed

A

Salt and hydrogen

acid + metal = salt + hydrogen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a displacement reaction

A

In those reactions, the more reactive metal always takes over the place of a less reactive metal

Eg: copper chloride + magnesium = magnesium chloride + copper

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the two types of reaction

A

Oxidation and reduction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is oxidation

A

Oxidation is a loss of electrons and a gain of oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is reduction

A

Reduction is a gain of electrons and a loss of oxygen

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a redox reaction

A

Displacement reactions when oxygen is removed from metal oxides

Eg: copper oxide + carbon = copper + carbon oxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is an ionic equation

A

When we do a regular balanced equation but involve all the charges of the ions involved in the reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is an acid

A

Acids form acidic solutions in water and produces hydrogen ions in aqueous solutions

Acidic solutions have pH values less than 7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is an alkali

A

Alkalis form alkaline solutions in water and produces hydroxide ions in aqueous solutions

Alkaline solutions have pH values more than 7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is a neutral solution

A

They have the exact pH value of 7, and are not alkaline or acidic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the pH scale

A

It measures the acidity and alkalinity of a solution.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

How else can we measure the pH of a solution

A

Universal indicators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is a base

A

A base is any substance reacting with an acid to form a salt and water. This shows metal oxides and metal hydroxides are bases

base + acid = salt + water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

How do we know if a base is alkaline or acidic

A

If a base is soluble in water, it is alkaline.

If a base is insoluble in water, it is acidic.

17
Q

What is an acid-alkali neutralisation

A

The reaction between hydrogen and hydroxide ions, forming water

18
Q

When do acids take part in reactions

A

When salts are produced. Hydrogen ions in acids are then replaced by metal ions

19
Q

What are acids neutralised by

A

By bases, alkalis and metal carbonates

20
Q

What is the equation for acids and metal oxides. Give the two products and the equation

A

Salt and water.

Acid + metal oxide = salt + water

21
Q

What is the equation for acids and carbonates. Give the three products and the equation

A

Carbon dioxide, water and salt

Acid + carbonate = salt + water + carbon dioxide

22
Q

How do we name salts

A

When naming a salt, it has two parts. The first part comes from the base, alkali or metal carbonate. The second part comes from the acid

Chemistry (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions