Incorrect Chem

Electrons flow from

Anode to cathode

What does the salt bridge in galvanic cells do

Keep solutions electrically neutral

Metal electrodes gain electrons at

cathode

What is true for a reaction witha negative delta H

Exothermic

How many electrons are involved in the following acidic redox reaction. ClO₃¯ + SO₂ ---> SO₄²¯ + Cl¯

6

What is the sum of the reactant coefficients in an acidic redox reaction. MnO₄¯ + CH₃OH ---> HCOOH + Mn²⁺

31

What is the correct electron configuration for the bromide ion Br-

[Ar] 4s²3d¹⁰4p⁶

What is the empirical formula of a compound composed of 50.05% sulfur and 49.95 oxygen?

SO₂

A compound is found to contain 31.42 % sulfur, 31.35 % oxygen, and 37.23 % fluorine by weight. What is the empirical formula for this compound?

SO₂F₂

A compound was found to contain 24.74% (by mass) potassium, 34.76% manganese, and 40.50% oxygen. Determine the empirical formula.

KMnO₄

What is the highest value of pressure

780 mmHg

How many kPa in an atm

101,325

How many torr in an atm

760

How many mmHg in an atm

760

If the pressure at equilibrium was more than the initial pressure, what can be said about the reaction quotient and direction of reaction as the reaction progressed towards equilibrium. N_2(g) + 3 H_2(g) → 2 NH_3(g)

Q_c>K_c, backward reaction

Q_c<K_c

Ratio of products to reactants is less than at equilibrium

What direction must a reaction go for pressure to increase

Side with more moles of gas

Quantity of acid or base delivered is

volume of titrant added * titrant concentration

How many mole sof oxygen are in 190 grams of KNO₃ at a temperature of 28 C

5.7

A sample of glucose (C₆H₁₂O₆) weighs 90 grams. If it is heated to 45 °C, how many moles of carbon atoms does it contain?

3 moles

How many moles of oxygen atoms are present in 82 grams of calcium nitrate, Ca(NO₃)₂, at room temperature?

3 moles

A lewis acid is

an electron acceptor

A lewis base is

an electron donor

A proton acceptor

Brosted-Lowry base

A proton donor

Bronsted-Lowry acid

In a fission reaction, uranium-235 is bombarded with a neutron and decays into two main radioactive fragments and 3 neutrons as depicted in the following reaction: ²³⁵U+ ¹n→ _¹⁴¹Ba+X+3¹n

⁹²Kr

Arrhenius Base

H+ producer

Arrhenius Acid

OH- producer

Strong Acids

I brought clean nitrate so accept

I brought clean nitrate so accept

HI, HBr, HCl, HNO3, HSO4

Never keep calcium bagged bro

NaOH, KOH, Ca(OH)2, BaOH

Strong bases

Never keep calcium bagged bro

Soluble salts

ABC’S GANG

ABC’S GANG

Ammonium, bicarbonate, chlorate, sulfate, group 1 metals, acetate, nitrate, group 17

Insoluble Salts

PMS HICCP

PMS HICCP

Pb2+, mercury, silver, hydroxide, carbonate, chromate, phosphate

Boyle’s Law

volume is inversely proportional to pressure

Charles law

volume is directly proportional to temperature

Avogadro’s Law

Volume is directly proportional to number of moles

Gay-Lussac’s Law

Pressure is directly proportional to temperature

Effusion Formula

r1/r2 = sqrt(m2/m1)

Pressure equation

force/area

Gas density

m/v or PM/RT

Simple cubic structure

1 atom divided into 8 parts

Body centered cubic structure

1 atom in center and 1 divided into 8 parts

Face centered cubic structure

2 half atoms on each face and 1 divided into 8 parts

Face centered cubic atom amount

4

Body centered cubic atom amount

2

Simple cubic atom amount

1

What is bigger heat of vaporization or heat of fusion

Heat of vaporization

Liquids with high boiling point have … vapor pressure

Lower vapor pressure

Convection

heat transfer within a fluid where hotter, less-dense material rises and cold, dense material sinks

Conduction

heat transfer that occurs between objects by direct contact

Work equation

w=(-P)delta(V)

Postive w

work done on system

Negative w

work done by system

Positive q

energy absorbed

Negative q

energy released

When ΔH°_rxn is negative

products are more stable and at lower energy state

When ΔH°_rxn is positive

reactants are more stable

Adiabatic

No heat change between surroundings and system

Isothermal

Temperature is constant but heat can come in and out

2nd Law of Thermodynamics

Entropy of universe is always increasing so heat flow from high to low

3rd Law of Thermodynamics

a substance at 0 K has no motion of kinetic energy

Spontanous at all temps

H < 0 and S > 0

Endergonic vs Endothermic

-gonic refers to change in free energy while -thermic refers to change in heat

Galvanic cells convert

chemical to electrical

Electrolytic cells convert

electrical to chemical

Galvanic cells flow

positive to negative

Electrolytic cells flow

negative to positive

Salt bridge found in

galvantic cell

Porous barrier found in

electrolytic cell

Electroplating

plating a thin layer of metal on top of another metal

Which side contains the item to be plated

cathode

Which side contains the metal to be plated

anode

Nuclear fission and fusion both

realease large amounts of energy

What nuclear change does not impact atomic number

Gamma decay