Chemical Reactions Flashcards Preview

Science Module 4 > Chemical Reactions > Flashcards

Flashcards in Chemical Reactions Deck (21):
1

When a compound is formed by two simpler substances

Combination or Synthesis

2

When a compound is broken down

Decomposition or Analysis

3

When a more reactive element replaces a less reactive element

Single Replacement or Single Displacement

4

When cations and anions exchange partners (forms insoluble precipitate)

Double Replacement, Double Displacement or Metathesis

5

Compound with C and H only (or C H O) reacts with oxygen to make CO2 and H2O (release of heat)

Combustion

6

Reactions where product cannot revert back

Irreversible reactions

7

Has equilibrium mixture of reactants and products

Reversible reactions

8

When is chemical equilibrium achieved?

When forward and backward reactions proceed at the same rate

9

Chemical reactions with absorption of heat

Endothermic reactions

10

Chemical reactions with release of heat

Exothermic reactions

11

When the oxidation state of an atom changes during the reaction

Redox reactions

12

Oxidation or reduction: Loses electrons

Oxidation

13

Substance being oxidized is called ___

Reductant

14

Oxidation or reduction: Gains electrons

Reduction

15

Substance being reduced is called ___

oxidant

16

What is the Law of Conservation of Mass?

atoms of reactant = atoms of product

17

What is Avogadro's number?

6.02 x 10^23

18

What is Molar mass?

mass of substance divided by amount (no. of moles) measured in g/mol

19

What is Atomic mass unit (amu)?

standard unit for indicating mass of atoms and molecules

20

What is formula/ molecular mass?

The formula mass of a molecule is the sum of the atomic weights of the atoms in the empirical formula of the compound

21

The two elements in liquid state at room temperature

Mercury and Bromine