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Chem 105 > lecture 11 > Flashcards

lecture 11 Flashcards

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1
Q

What is the definition of Arrhenius acid and base?

A

Acids are H+ donors
Bases are OH-

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2
Q

What is the definition of Acid and bases under Bronsted-Lowery?

A

Acids are proton donors
Bases are proton acceptors

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3
Q

Which definition for acid and bases is limiting and why?

A

Arrhenius because not ever base is a hydroxyl

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4
Q

What is a titration?

A

careful reaction with known volume of substance with known concentration

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5
Q

What is the titrant?

A

the known

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6
Q

What is the analyte?

A

the unkown

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7
Q

What is the importance of the end point?

A

There is the same number of moles of the titrant and analyte

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8
Q

What is oxidation?

A

the loss of electrons

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9
Q

What is reduction?

A

the gain of electrons

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10
Q

The sum of oxidation states is 0 in _____

A

compounds

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11
Q

The sum of oxidation states is the charge of the ____ in ions

A

ion

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12
Q

Gases have high _____ energy

A

kinetic

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13
Q

Gases have very ____ denstiy

A

low

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14
Q

Why do gases have very low density?

A

Because they are far apart

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15
Q

Gases have extremely low ______ forces

A

intermolecular

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16
Q

What does the ideal gas law assume?

A
  1. That there are no interactions between gas atoms and molecules
  2. Gas atoms/ molecules have 0 volume
17
Q

What is the equation for pressure?

A

force/ area

18
Q

What is the molecular explanation of pressure?

A

collisions of molecules with the walls of the container

19
Q

What device is used to measure atmospheric pressure?

A

Barometer

20
Q

In a barometer, what is the reference pressure?

A

0

21
Q

What device is used to measure the pressure in a system?

A

Marometer

22
Q

What is boyle’s law?

A

the volume of gas is inversely proportional to pressure if pressure is constant

23
Q

What is the explanation for Boyle’s law?

A

If same number of molecules move in a bigger space there will be less collisions with the wall

24
Q

What is the equation for Boyle’s law?

A

V= 1/p (Kb)

25
Q

What is Charles’ law?

A

At constant pressure, the number of mols of gas is directly proportional to the temperature

26
Q

What unit should temperature always be in?

A

Kelvin

27
Q

What is the molecular explanation for Charles’ law?

A
  1. increased temperature makes particles travel faster
  2. more collisions= higher internal pressure
  3. volume expands until internal pressure= external pressure

Chem 105 (24 decks)

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