final mult choice chem 112 spring 2026

predict direction of shift 2Hl(g) +Br(l) → 2HBr (g) + Cl2 (g)

decreasing temp

← because Removing heat shifts the reaction to make heat

predict direction of shift 2Hl(g) +Br(l) → 2HBr (g) + Cl2 (g)

Increase the volume of the container

Increasing volume = lower pressure, so equilibrium shifts toward more gas moles.

• Left: 2 mol gas

• Right: 3 mol gas

→

predict direction of shift 2Hl(g) +Br(l) → 2HBr (g) + Cl2 (g)

removing Hcl

← Removing a reactant makes the system try to replace it.

predict direction of shift 2Hl(g) +Br(l) → 2HBr (g) + Cl2 (g)

Adding HBr

← Adding a product makes the system try to consume it.

predict direction of shift 2Hl(g) +Br(l) → 2HBr (g) + Cl2 (g)

adding Ne (g)

At constant volume, inert gases don’t change the partial pressures of reacting gases. no effect

predict direction of shift 2Hl(g) +Br(l) → 2HBr (g) + Cl2 (g)

adding Br2

no effect - Br₂ is a pure liquid, so it does not appear in the equilibrium expression.

t/f: catalysts are regenerated at the end of a reaction

true

t/f: an increase in activation energy leads to an increase in reaction rate

false

t/f: all radioactive decay is a first order reaction

true

t/f:if Kp=4.4×10^-5, the reaction favors the products

false

t/f: as the rate increases so does the rate constant

true

which plot would be a straight line for a 1st order reaction?

[reactant] vs time

what are the units of the rate constant for a third order reaction?

M^-2 S^-1

t/f: Equilibrium is a state at which the forward and reverse reaction rates are equal.

true

t/f: An increase in collisions leads to an increase in reaction rate

true

t/f: If KP = 1.6 x 10 5 , the reaction favors the reactants.

false - if k>1 favors products

t/f: Generally, the rate of a reaction increases as a reaction proceeds.

false - opposite happens

t/f: Catalysts increase the rate of a reaction by decreasing the activation energy.

true

which plot would be a straight line for a zero order reaction?

[reactant] vs time

what are the units for a 1st order reaction?

S^-1

calculate kc!

Knew= 1/K og

metallic solids are formed by…

metals

higher vapor pressure is

the bigger molecule

higher melting point is

whatever has hydrogen bonding

higher melting point is determined by…

most imf’s (hb is the winner)

what is sublimation?

the phase transition of a substance directly from solid to gas, bypassing the liquid phase

t/f: adhesive forces are IMFs within a substance.

false

t/f: gas solutes have decreased solubility at low pressures

true

t/f: solid solutes usually have increased solubility at low temps

false

t/f: dispersion forces increase with an increase in a molecules surface area

true

if a red blood cell is put in a hypertonic solution, water will…

flow OUT of the cell

Solution A is NaCl (aq). When more NaCl (s) is added to A, no additional solid dissolves. Solution A was…

Saturated

which solute has the largest Van’t Hoff factor (i)

Na3PO4 because it splits up with the most stuff i=4 3Na= 3, PO4=1

molecular solids are held together by…

IMFs

circle the compound that will be most soluble in hexane (C6H14)

CH3CH3

Which is the strongest acid? H3PO4 or H3PO3

H3PO4

Which is the strongest acid? HIO or HBrO

HBrO

Which is the strongest acid? NH3 or CH4

NH3

which is the strongest base? Cl- or F-

F-

which is the strongest base? OH-1 or NH^1- 2

NH^1- 2

which is the strongest base? SO²- 4 or SO²- 3

SO²- 3

indicate if solution is acidic, basic, or neutral: NH4Br

acidic

indicate if solution is acidic, basic, or neutral: LiNO3

Neutral

indicate if solution is acidic, basic, or neutral: BaBrO

basic

indicate if solution is acidic, basic, or neutral: AlCl3

acidic

order from least to most acidic: LiBr, NaNO2, H2SO4, HF

NaNO2, LiBr, HF, H2SO4

t/f; pure water contains equal amounts of hydronium and hydroxide ions

true

t/f: in a weak acid/ base titration, the pH at the eq point is equal to 7

false

t/f: NaOH + any acid results in an irreversible reaction

true

t/f: if Qsp is larger then Ksp, a precipitate will form

true

t/f: The stronger the acid, the weaker its conjugate base

true

write the Ksp expression for Sn(OH)4 in terms of ion concentration

ksp= [Sn][OH-]^4

in which of the following solutions would BaCO3 have an increased solubility compared to pure water?

1.0 M HCl

in which of the following solutions would BaCO3 have a decreased solubility compared to pure water?

1.0 NaOH

write the conjugate base of HSO^1- 3

SO^-2 3

write the conjugate acid for NH3

NH^+1 4