Abeka Chemistry: Precision and Design Test 9 9Nine-Weeks Exam)

no shift would occur

For the reaction 3 Fe(s)+4 H₂O(g) === Fe₃ O₄(s)+4 H₂(g), in what direction does adding a catalyst shift the equilibrium?

no shift would occur

For the reaction AgH₂C₃O₂(aq) === Ag⁺(aq)+H₂C₃O₂⁻(aq), in what direction does an increase in pressure shift the equilibrium?

K=290

For the reaction CO(g)+2 H₂(g) === CH₃OH(g) at 700.K, equilibrium concentrations are [H₂]=0.072 M, [CO]=0.020 M, and [CH₃OH]=0.030 M. Calculate K.

remain unchanged

H₂ (g)+I₂ (g) ==== 2 HI(g)=heat Adding a catalyst to the system would cause the concentration of HI to ____.

increase

H₂ (g)+I₂ (g) ==== 2 HI(g)=heat Adding hydrogen to the system would cause the concentration of HI to ____.

right

H₂ (g)+I₂ (g) ==== 2 HI(g)=heat Adding iodine vapor to the system would shift the equilibrium to the ____.

no shift would occur

H₂ (g)+I₂ (g) ==== 2 HI(g)=heat Increasing the pressure would shift the equilibrium to the ____.

left

H₂ (g)+I₂ (g) ==== 2 HI(g)=heat Increasing the temperature would shift the equilibrium to the ____.

right

H₂ (g)+I₂ (g) ==== 2 HI(g)=heat Removing the hydrogen iodide as soon as it is formed would shift the equilibrium to the _____.

K=1.1×10⁻⁵ M

Nitrogen and oxygen react according to the equation N₂(g)+O₂(g) === 2 NO(g). At 1500 K, K=1.1×10⁻⁵ for this reaction. At equilibrium, [N₂]=6.4×10⁻³ M and [O₂]=1.7×10⁻³ M; calculate [NO].

the change in concentration of a given substance per unit of time

The rate of a chemical reaction is usually measured as ____

supersaturated

The solubility product of Ag₂CO₃ is 8.1×10⁻¹². Is a 1.5×10⁻⁴ M solution of Ag₂CO₃ saturated, unsaturated, or supersaturated?

sulfar

extracted from petroleum and natural gas by the Claus process; used to make an important industrial acid

nitrogen

extracted from the air and used to make artificial fertilizers and explosives

fluorine

halogen used in dental hygiene and in the manufacture of refrigerants

chlorine

halogen used in disinfection of drinking water and the synthesis of medicines, crop-protection chemicals, and PVC plastics

increase

if a nonvolatile solute such as glucose is added to water, the boiling point will ____

double

if the temperature of a chemical reaction is increased from 20 C to 30 C, we would ordinarily except the reaction rate to ____

solvent

in a solution of sodium chloride in water, water is the ____

hydrogen

isotopes are commonly called protium, deuterium, and tritium

ok, ok

know what an endothermic reaction thingy looks like

copper

metal used in electrical wiring and as a component of brass and bronze

silicon

most common semi metal; found In computer chips, sand and glass

helium

noble gas used as a lifting gas in airships and weather balloons, as an extremely low-temperature coolant, and as a laser medium

oxygen

ozone is an allotrope of this element

platinum

precious metal used in automotive and industrial catalyst

enzymes

protein catalyst found in living things are ____

electrolytes

substances that dissolve in water to produce ions that can conduct an electrical current are called ____

Le Chatelier's

the effect of changes on equilibrium systems is described by ____ principle

osmosis

the flow of solvent through a semipermeable membrane from a more dilute solution to a more concentrated solution is called ____

iron

the metal most commonly refined by means of blast furnaces

activation anergy

the minimum kinetic energy that a molecule must posses to undergo chemical reaction is the ____

hydrogen

the most abundant element in the universe

aluminum

the most abundant metal in the earth's crust ; a lightweight metal widely used to make aircraft, spacecraft, and beverage cans

gold

the most malleable and ductile metal known

metallurgy

the science of extracting metal form their ores and preparing them for use is known as ____

iron

the second most abundant metal in the earth's crust; the cheapest and most widely used metal

kinetics

the study of reaction rated and pathways is chemical ____

transition-state

the theory that when two molecules collide and chemically react they form a short-lived activated complex before breaking apart to form the products is the ____ theory

grinding solid reactants, introducing a catalyst, increasing the temperature

three changes that would increase the rat of a chemical

0.50 M

what is the molarity of a solution containing 6.0 mol NaCl dissolved in 12 L of water.

rated of forward and reverse reactions are equal

which of the following statements best describe a system at equilibrium

increase

When a gas is dissolved in water, decreasing the temperature tend to ____ the solubility of the gas

a catalyst shifts the equilibrium of a chemical reaction toward the products

Which of the following statements is true about the catalyst

increasing the pressure of the reaction chamber

Which of the following would NOT cause the reaction 2 Al(s)+6 HCl(aq) === 3 H₂(g)+2 AlCl₃(aq) to shift to the right?

K= [NOBr]²÷[NO]²[Br]₂

Write the equilibrium constant expression for the reaction 2 NO(g)+Br₂(g) === 2 NOBr(g)

K= [CaCl₂][CO₂]÷[HCl]²

Write the equilibrium constant expression for the reaction CaCo₃(s)+2 HCl(aq) === CaCl₂(aq)+CO₂(g)+H₂O(l).

K∨sp=[Al³⁺][OH⁻]³

Write the solubility product constant expression for aluminum hydroxide.

polar

a ____ substance will be more likely to dissolve in a polar solvent than in a nonpolar solvent

equilibrium

a chemical system in which the rates of reaction in opposite directions have equalized so that the concentration of reactants and products is constant is in a state of chemical ____

stress

a factor that causes a change in an equilibrium system is called a ____

oxygen

a gas found in air that is necessary for the survival of humans and animals

colloid

a mixture containing tiny clumps or particles that remain suspended within the mixture and will not settle out is a(n) ____

alloy

a mixture of two or more metals, usually melted together, is a (n) ____

saturated

a solution that contains as much dissolved solute as possible under equilibrium conditions is said to be ____

catalyst

a substance that increases the rate of a chemical reaction without being consumed in the reaction is a (n) ____

sodium

alkali metal found in lye, washing soda, baking soda, and table salt

calcium

alkaline earth metal that helps compose limestone, slaked lime, and cement

phosphorus

exists an unstable white allotrope and a more stable allotrope; used to make matches and some fertilizers