CHE Final Exam Flashcards

1
Q

Alpha and beta particles

A

Positively and negatively charged particles, respectively

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Gamma rays

A

Neutral charge, high-energy radiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Nuclear theory

A

Supported by Rutherford’s experiment:

nucleus = most of atom’s mass w/protons & neutrons

empty space = most of atom’s space w/electrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Polyatomic molecules in nature

A

P4
S4
Se4
O3

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Noble metals

A

Ag, Pt, Au

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Transition metals with predictable charge (3)

A

Ag (1B = 1+)
Zn (2B = 2+)
Cd (2B = 2+)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

1 prefix (HC)

A

meth-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

2 prefix (HC)

A

eth-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

3 prefix (HC)

A

prop-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

4 prefix (HC)

A

but-

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

HC suffixes (single, double, & triple bonds)

A

-ane, -ene, -yne

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Alkanes

A

Hydrocarbons with only single bonds (-anes)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Percent yield

A

% yield = ( actual / theoretical ) * 100%

*NOT PERCENT ERROR!

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Dilution formula

A

M1V1 = M2V2

M = molarity, V = volume (liters)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Dissociation

A

Ions of a salt separate when dissolved

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Ionization

A

Process of ion formation in solution

(acids, bases)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Arrhenius acids & bases

A

Acids produce H+ (H3O+) in water

Bases produce OH- in water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Brønsted acids & bases

A

Acid = proton donor

Base = proton acceptor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Monoprotic, diprotic, and tripotic acids

A

Each unit of acid yields one, two, and H+ ion(s) respectively

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Neutralization reaction result

A

salt + water + heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Gas-evolving reactions & compounds (4)

A

Acid + salt –> salt + gas + water

Sulfides

Bicarbonates

Bisulfites

Ammonium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Oxidation half-reaction

A

Shows loss of electrons (OIL)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Reduction half-reaction

A

Shows the gain of electrons (RIG)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Oxidizing agents

A

Are reduced (RIG)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Reduction agents
Are oxidized (OIL)
26
Disproportionation reaction
Same element is *simultaneously* oxidized & reduced
27
Modified dilution equation
MacidVacid(# of H+) = MbaseVbase(# of OH-)
28
Pressure unit conversion
760 mmHg = 760 torr = 1 atm = 101,325 Pa
29
Molar mass of gas formula
M = dRT/P molar mass = (density) \* R \* (Kelvin) / (atm) D = PM/RT = pressure \* molar mass / R \* temp
30
Average KE
Constant tempterature: gases have same average KE
31
Root mean square velocity
urms = (3RT/M)1/2 ``` R = J/mol K T = Kelvin M = kg/mol ```
32
Graham's law of effusion
ra/rb = (Mb/Ma)1/2
33
Real gases
Behavior differse at high pressure/low temperature
34
Energy unit conversion (4 equalities)
1 J = 1 kg\*m2/s2 1 cal = 4.184 J 1 Cal = 1kcal 1 L\*atm = 101.3 J
35
Internal energy & change in internal energy
E (internal energy) = KE + PE ΔE = Eproducts - Ereactants ΔE = q + w \*+w work done ON system, -w work done BY system ΔEsystem = -ΔEsurroundings
36
Pressure-volume work
w = -PΔV work = negative of external pressure \* change in volume
37
Enthalpy/change in enthalpy formula
Enthalpy = H H = E + PV (internal energy + pressure\*volume) ΔH = ΔE + PΔV ΔH = Hproducts - Hreactants
38
Heat capacity
q = C \* Δt Amount of heat to raise temperature by 1°C C = J/°C or J/K System absorbs heat = temperature increasse
39
Specific heat capacity
q = m \* Cs \* Δt Measure of substance's ability to absorb heat/amount of heat required to raise 1 g of substance by 1°C
40
Bomb calorimeter
Constant-volume calorimetry ΔErxn = qv = qrxn = -qcal **qcal** = Ccal \* ΔT = **-qrxn**
41
Coffee-cup calorimetry
Constant-pressure calorimetry ΔHrxn = qp = qrxn = -qsoln **qsoln =** msoln \* Cs, soln \* ΔT **= -qrxn**
42
Standard enthalpy of formation
ΔHf° Heat change when one mole is formed from elements at 1 atm Most stable = 0 Stable liquids: Hg, Br Stable gases: H2, N2, O2, F2, Cl2, noble gases Graphite is stable, diamond is not S8 **rhombic** is stable
43
Standard enthalpy of a reaction
The enthalpy of a reaction carried out at 1 atm ΔHrxn° = ΣnproductsΔHf° - ΣnreactantsΔHf°
44
Hess' law
ΔHrxn° = ΔH1° + ΔH2°
45
Frequency formula
v = c / λ
46
Electromagnetic spectrum
Low energy to high: radio microwave infared visible light ultraviolet X-ray gamma ray
47
Photoelectric effect
Many metals emit electrons when light shines on surface
48
Number of photons formula
Number of photons = Epulse / Ephoton \*Ephoton = hc/λ
49
Energy & frequency combined formula
v = c / λ E = hv E = hc/λ
50
Wavelength formula
λ = h/mv Planck's constant / mass \* velocity
51
Energy of electron orbital change formula
ΔEH atom = -R (1/n2final - 1/n2initial) R = Joules
52
1 Hz = ? s-1
1 Hz = 1 s-1
53
Pauli exclusion principle
No two electrons can have same four quantum numbers Orbital = 2 electrons max
54
Aufbau principle
Lower energy orbitals fill before higher energy orbitals to minimize energy of atom
55
Hund's rule
Electrons first occupy orbitals of equal energy singly with parallel spins
56
Transition elements with irregular electron configurations (10)
1. Cr (Chromium) 24 2. Cu (Copper) 29 3. Nb (Niobium) 41 4. Mo (Molybdenur) 42 5. Ru (Rutherium) 44 6. Rh (Rhodium) 45 7. Pd (Palladium) 46 8. Ag (Silver) 47 9. Pt (Platinum) 78 10. Au (Gold) 79
57
Van der Waals radius
Nonbonding radius of an atom
58
Cation v. anion radius size
Cations \< anions Except Rb+ and Cs+ are larger than F- and O2-
59
Periodic trends in first ionization energy
The larger the Zeff, the more energy it takes to remove it. \*IE1 increases to the right \*\*Except: Group 2A to 3A & Group 5A to 6A The farther the electron is from the nucleus, the less energy it takes to remove it \*IE1 decreases toward the bottom
60
Electron affinity
X (g) + e- → X- (g) + EA The energy released (-kJ/mol) when a neutral gaseous atom gains an electron The more energy released when electron is gained, the more negative the EA (-kJ/mol) \*INCREASES TO THE RIGHT
61
Diagonal relationship
1. Li & Mg 2. Be & Al (Al is a metal like 2A) 3. B & Si (metalloids) Similar because of charge density (ion charge / volume)
62
Properties of oxides across a period (3)
1. Metals/Groups 1A/2A form basic oxides 2. Nonmetals form acidic oxides 3. Al form amphoteric oxides (both basic/acidic)
63
Formal charge (4)
Charge an atom would have if all bonding electrons were shared equally FC of an atom = Valence e- - nonbonding e- - (1/2)(bonding e-) 1. Sum of all formal charges in neutral molecule = 0 2. Sum of all formal charges in ion = ion charge 3. Small (or zero) formal charges on individual atoms are better than large ones 4. When formal charge cannot be avoided, negative formal charge should reside on the most electronegative atom
64
The Clausius-Clapeyron Equation
ln P2/P1 = (-ΔHvap/R) (1/T2-T1) R = 8.314 J/mol K T = in Kelvin
65
Equation for heat involved in completion of a phase change
q = nΔHtransition heat = # of mols \* heat of [transition]
66
Equation for heat involved in temperature change
q = (m) (Cs) (ΔT)