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General Chemistry > Chapter 4 > Flashcards

Chapter 4 Flashcards

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1
Q

Molecule

A

2 or more molecules held together by covalent bond

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2
Q

Molecular weight

A

Sum of atomic weights of the atom in a molecule

Units : amu / molecule

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3
Q

Formula weight

A

Adding up atomic weights of ions

Units : amu/ molecule

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4
Q

Gram equivalent

A

Molar mass /n

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5
Q

Equivalent

A

Mass of compound (g)/ gram equivalent weight (g)

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6
Q

What are the units for normality

A

Equivalent / L

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7
Q

What is the formula for conversion of normality to molarity?

A

Molarity = normality /n

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8
Q

What is the formula to calculate normality ?

A

Molarity x n

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9
Q

Law of constant composition

A

Any pure sample of a given compound will contain the same elements in an identical mass ratio

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10
Q

Empirical formula

A

Gives the simplest whole number ratio of elements in a compound

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11
Q

Molecular formula

A

Exact number of elements in the compound

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12
Q

What is the formula for percent composition ?

A

Percent composition =

mass of element in formula / molar mass x 100

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13
Q

Combination reaction

A

Two or more reactants form one product

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14
Q

Decomposition reaction

A

Single reactant breaks down into two or more products

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15
Q

Combustion reaction

A

Hydrocarbon + oxygen –> CO2 + H2O

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16
Q

Single displacement reaction

A

When an atom or ion in a compound is replaced by another atom or ion

17
Q

Double displacement reaction

A

Two different compounds swap places to for, two new compounds

18
Q

Neutralization reaction

A

Double displacement reaction in which an acid reacts with a base to form a salt

19
Q

Law of conservation of mass

A

Mass of reactants consumed equals the mass of product generated

20
Q

What is the formula for percent yield?

A

Percent yield = actual yield/ theoretical yield x 100

21
Q

When is the ending ous used ? When is the ending ic used ?

A

Ous - ion with lesser charge

Ic- ion with greater charge

22
Q

How are the endings ite and ate used for oxyanions ?

A

Ite - lighter anions with less oxygen

Ate - anions with more oxygen

23
Q

How are the endings hypo and per used in extended series of anions ?

A

Hypo - less oxygen

Per - more oxygen

General Chemistry (5 decks)

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