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Chem 105 > Chemistry Test review 2 > Flashcards

Chemistry Test review 2 Flashcards

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1
Q

What is the reason for an atom to have a charge at a molecular level?

A

Atoms have no charge because their protons and electrons are suppose to be equal.

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2
Q

What is the concept of limiting reagent problems?

A

When there are varying amounts of reactants given and different number of moles required for the reaction to occur then one of the reactants will be used up before the other reactant

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3
Q

How can you identify the limiting reagent?

A

by comparing the calculated molar ratios to the stoichiometric ratios

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4
Q

How do you calculate percent yield?

A

AY/ TY x 100

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5
Q

What is the equation for concentrations?

A

m1v1=m2v2

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6
Q

Do weak acids dissociate?

A

Yes but slightly

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7
Q

Do strong acids dissociate?

A

Yes, they completely dissociate

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8
Q

Do non-electrolytes dissociate?

A

No, that is why they don’t conduct electricity

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9
Q

What are factors leading to the quantity of solute dissolved?

A
  1. polarity
  2. temperature
  3. pressure
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10
Q

What factors can speed up dissolution?

A
  1. temperature
    2.surface area
  2. intermolecular forces
  3. agitation
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11
Q

What is the dilution calculation?

A

c1v1=c2v2

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12
Q

What is the molecular basis of dilution?

A

The number of moles does not change, but the concentration can decrease if the volume increases

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13
Q

What is the complete ionic formula for a chemical equation?

A

It includes all the ions dissociated in the equation

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14
Q

What is the molecular formula for a chemical equation?

A

It has all the reactants and products present and they are not dissociated

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15
Q

What is the net ionic equation for a chemical reaction?

A

It the equation that only has the ions that are part of the actual reaction present

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16
Q

What is a precipitation reaction?

A

A reaction between two aqueous solutions that results in the production of a solid

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17
Q

What is a acid base reaction?

A

A reaction where a proton is donated and a proton is accepted

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18
Q

How can you predict products of precipitation reactions?

A

with solubility rules

19
Q

Sulfates are soluble except with….

A

Pb, Ag, Hg, Ca, Sr, Ba

20
Q

Ammonium is soluble except with…

A

trick question, it is soluble with everything

21
Q

Group 17 is soluble except with

A

Pb, Hg, and Ag

22
Q

Hydroxides are insoluble except with

A

Ca, Sr, Ba, group 1

23
Q

Sulfides are insoluble except with

A

Sr,Ca, Ba, group 1

24
Q

Carbonates are insoluble except with

A

group 1

25
Q

Phosphates are insoluble except with

A

group 1

26
Q

Nitrates are always soluble or insoluble

A

soluble

27
Q

acetates are always soluble or insoluble

A

soluble

28
Q

group 1 are always soluble or insoluble

A

soluble

29
Q

What is pressure?

A

it is molecules hitting the walls of the container

30
Q

What is Charles’s Law?

A

V1/T1= V2/T2

31
Q

Boyle’s law equation

A

P1V1=P2V2

32
Q

Gay-Lussac’s Law

A

P1/T1=P2/T2

33
Q

What is the combined law?

A

P1V1/ T1= P2V2/T2

34
Q

What is the ideal gas law?

A

PV=nRT

35
Q

What is Avogradro’s Law?

A

V1/n1= V2/n2

36
Q

What is Dalton’s law?

A

Ptotal= P1+P2+P3+Pn

37
Q

What is the ideal gas law manipulated for density

A

d= (molar mass M)P/RT
Dreams Push Me through Rough Times

38
Q

What is the equation for molar mass with ideal gas law?

A

M=mRT/ PV
Molar Mass Really Tests our Valuable Patience

39
Q

What are the five assumptions of the Kinetic Molecular Theory?

A
  1. Gas particles are in constant, random, straight line motion
  2. Particles are separated by great distances
  3. Collisions are rapid and elastc
  4. No force between particles
  5. Total energy remains constant
40
Q

What is the equation for the root mean square velocity?

A

Urms= square root (3RT/M)

41
Q

What is the equation with velocity to get KE?

A

KE= 1/2M(u)^2

42
Q

What is the van der Waals equation and what is it for?

A

When gases do not behave ideally
(P+an^2/V^2) (V-nb)=nRT

43
Q

When do real gases DO NOT Behave ideally?

A
  1. when they are at low temperature and high pressure
  2. have large polar molecules
44
Q

When do gas behave ideally?

A
  1. when they are at high temperature and low pressure
  2. when they have small non-polar molecules

Chem 105 (24 decks)

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