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Gamsat 24 > Chem > Flashcards

Chem Flashcards

1
Q

Number of valence electrons determines what?

A

How many covalent bonds are possible

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2
Q

Electronegativity of atoms in a covalent bond determines what?

A

Bond polarity

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3
Q

Bond polarity (primary) and electronegativity (secondary) influence what?

A

Reaction likelihood and bond strength

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4
Q

What is the valence and bond capability of c?

A

4,4

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5
Q

What is the valence and bond capability of n?

A

5,3

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6
Q

What is the valence and bond capability of o?

A

6,2

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7
Q

What is the valence and bond capability of f and other halogens?

A

7,1

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8
Q

What unit is used in chemistry to group amounts of atoms/ particles

A

The mole

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9
Q

What is avagadros constant

A

It is how moles are calculated
1 mole = 6.02*10^23 particles/ atoms

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10
Q

What equation is used for mass moles

A

n=m/M

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11
Q

What is equation is used for volume mols

A

n=c*V

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12
Q

What is the difference between number of moles and molarity

A

Number of moles is amount of stuff molarity is amount of stuff in solution ie concentration unit

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13
Q

What is the equation for calculating gas mol

A

P/RT = n/V

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14
Q

What is the gas law

A

PV=nRT

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15
Q

How do reactions obey the law of conservation of mass

A

Molar amounts must remain consistent between reactants and products ie balanced equations

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16
Q

What is reaction rate

A

How quickly reactants are used or how quickly products are formed

17
Q

What is reaction yield

A

How much is produced from a reaction

18
Q

What units express reaction rate

A

Change in concentration/ time mol/s

19
Q

Kinetic theory suggests four ways to change reaction rate

A

Change concentration, change in temperature, change in volume or pressure, add a catalyst

20
Q

What is the a quotient

A

An expression of reaction rate where q= [products][reactants]

21
Q

What is dynamic equilibrium

A

A point where the rate of the forward and reverse reaction are equal

22
Q

What is the k quotient

A

The reaction rate equation but for the point where equilibrium is achieved

23
Q

If q is left of k which reaction is favoured

A

The forward reaction

24
Q

If a is right of k which reaction is favoured

A

The reverse reaction

25
Q

What is le chateuliers principle

A

That a system at equilibrium will try to resist any changes made to it

26
Q

According to le chat if I increase reactants the k value will shift

A

Right

27
Q

According to le chat if I increase pressure

A

The system will move to a lower pressure state

28
Q

According to le chat if I increase temp

A

The system will shift to favour the lower temp state

29
Q

How do I determine rate laws?

A

But observing multiple experiments and seeing how changes in reactants influences rate

Gamsat 24 (3 decks)

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