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Science Module 4 > Chemical Reactions > Flashcards

Chemical Reactions Flashcards

1
Q

When a compound is formed by two simpler substances

A

Combination or Synthesis

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2
Q

When a compound is broken down

A

Decomposition or Analysis

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3
Q

When a more reactive element replaces a less reactive element

A

Single Replacement or Single Displacement

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4
Q

When cations and anions exchange partners (forms insoluble precipitate)

A

Double Replacement, Double Displacement or Metathesis

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5
Q

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

A

Combustion

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6
Q

Reactions where product cannot revert back

A

Irreversible reactions

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7
Q

Has equilibrium mixture of reactants and products

A

Reversible reactions

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8
Q

When is chemical equilibrium achieved?

A

When forward and backward reactions proceed at the same rate

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9
Q

Chemical reactions with absorption of heat

A

Endothermic reactions

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10
Q

Chemical reactions with release of heat

A

Exothermic reactions

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11
Q

When the oxidation state of an atom changes during the reaction

A

Redox reactions

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12
Q

Oxidation or reduction: Loses electrons

A

Oxidation

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13
Q

Substance being oxidized is called ___

A

Reductant

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14
Q

Oxidation or reduction: Gains electrons

A

Reduction

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15
Q

Substance being reduced is called ___

A

oxidant

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16
Q

What is the Law of Conservation of Mass?

A

atoms of reactant = atoms of product

17
Q

What is Avogadro’s number?

A

6.02 x 10^23

18
Q

What is Molar mass?

A

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

19
Q

What is Atomic mass unit (amu)?

A

standard unit for indicating mass of atoms and molecules

20
Q

What is formula/ molecular mass?

A

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

21
Q

The two elements in liquid state at room temperature

A

Mercury and Bromine

Science Module 4 (4 decks)

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