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Chemistry > Quantitative Chemistry > Flashcards

Quantitative Chemistry Flashcards

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1
Q

What is the Conservation of Mass?

A

Atoms cannot be created or destroyed

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2
Q

When a Metal forms a Metal Oxide, why does the Mass increase?

A

Oxygen Atoms have been added

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3
Q

When an Acid reacts with a Metal, why does the Mass decrease?

A

A Gas is produced and it escapes

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4
Q

What is the Relative Formula Mass?

A

The Sum of the Relative Masses of each Atom in a Compound

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5
Q

What are the 4 State Symbols?

A

Solid (s)
Liquid (l)
Gas (g)
Aqueous (aq)

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6
Q

What is the Symbol for Relative Formula Mass?

A

Mr

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7
Q

What is a Mole?

A

A Number of Particles

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8
Q

What is Avogadro’s Number?

A

6.022* 10^23

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9
Q

Which Formula relates Moles, Mass and Mr?

A

Moles= mass/Mr

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10
Q

What is a Limiting Reactant?

A

A Reactant that does not have enough Mass to react with all the other Reactants

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11
Q

What is the Unit for Concentration?

A

g/dm^3

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12
Q

Which Formula relates Concentration, Mass and Volume?

A

Concentration= mass/Volume

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13
Q

If the quantity of a Solute in a Solution is Increased, what happens to the Concentration?

A

It Increases

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14
Q

If the Volume of Water in a Solution is Increased, what happens to the Concentration?

A

It Decreases

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15
Q

What is the Yield of a Chemical Reaction?

A

How much Useful Product there is

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16
Q

What is the Theoretical Yield of a Chemical Reaction?

A

The Yield which you would expect to get in a Reaction

17
Q

What is the % Yield of a Chemical Reaction?

A

How much actual product there is divided by the Theoretical Yield

18
Q

Why is the % Yield almost never 100%?

A

Reversible Reaction
Loss of Product on Separation
Unexpected Side Reactions

19
Q

What is Atom Economy?

A

How much starting Material ends up as Useful Product

20
Q

Why is Atom Economy important?

A

Economic and Sustainability reasons

21
Q

How is Atom Economy Calculated?

A

100*Mr Desired Product

22
Q

What are the 2 Units for Concentration?

A

g/dm^3

mol/dm^3

23
Q

What is the purpose of Titration?

A

To establish the Concentration of an unknown Solution

24
Q

What do Moles of Gases and their Volumes have in common?

A

At the same Temperature they occupy the same Volume

25
Q

What is the Volume of one Mole of any Gas at Room Temperature and Pressure?

A

24dm^3

Chemistry (4 decks)

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