Le Chatlier’s Principle Top of the inner cone

Final Review

Le Chatlier’s Principle

When a system at equilibrium is disturbed by application of a stress, it attains a new

equilibrium position that minimizes the stress. This is known as ________.

Top of the inner cone

Where is the hottest part of the Bunsen burner flame?

2

One orbital can hold a MAXIMUM of ______ electrons.

Atmospheric pressure

A liquid will boil when equilibrium vapor pressure

equals __________.

Polar solute

If you are using a polar solvent, what type of solute will most likely

dissolve?

Endothermic

Suppose that during the reaction a chemistry student touches the beaker and observes that it feels COLD. The

student should conclude that the chemical reaction is ______. 

Long pantsClosed toe shoesHair pulled back

No baggy sleevesNo dangling jewelry

What are 2 examples of appropriate dress in the lab?

Mass number

A certain isotope of hydrogen has the following hyphen notation: hydrogen-

2. The number 2 represents the ______.

Erlenmeyer Flask

Identify:

Decomposition

Given the following word equation:

2H2O 2H2 + O2 . What type of reaction does this

equation represent?

volume

mL is a unit of ____.

pressure

kPa is a unit of _____.

Alkaline Earth Metal

What type of element is Mg?

Florence Flask

Identify:

Water

Suppose you made a salt water solution. What is the

solvent?

(aq)

What symbol is used in a chemical equation to indicate that a

substance is dissolved in water?

Halogen

What type of element is F?

Compound

A substance made of two or more elements whose atoms are

chemically combined is a(n) ______.

Salt

Suppose you made a salt water solution. What is the

solute?

Saturated

A stable solution in which the maximum amount of

solute has been dissolved is _______

Single Displacement

Given the following word equation:

2Na + 2HCl 2NaCl + H2. What type of reaction does this

equation represent?

Watch glass

What is used as a cover to the evaporating dish?

Neutrons

Isotopes of a given element have a different number of

______.

Homogeneous

Food coloring and water is considered a ______ mixture.

(s)

What symbol is used in a chemical equation to indicate that a substance is a solid?

Fusion

The process of joining atomic nuclei is called____

Catalyst

A substance that increases the rate of a reaction without itself being changed is a(n) ______.

Trigonal Planar

What is the molecular geometry of the following?:

Solution

A homogeneous mixture is also known as a(n) ______.

14

Suppose an atom has 6 protons and 8 neutrons. What is the

mass number?

Ne (it’s a noble gas!)

Which of the following elements is MOST stable?

Na, U, Ba, Cl, Ne

Mass

“g” is a unit of _____.

Polar covalent

A bond where there is an UNEQUAL SHARING of electrons is ______.

Release OH- ions in water

According to Arrhenius, bases are defined as substances that

______.

Trigonal pyramidal

What is the molecular geometry of the following:

Watch glass

Identify:

Heterogeneous

Soil is considered a ______ mixture.

(g)

What symbol is used in a chemical equation to indicate

that a substance is a gas?

Hydrogen

Suppose a reaction is occurring in a test tube. Further, suppose that a lit splint held over the test tube “pops” and/or “barks”. The gas in the test

tube is most likely ______.

HeatingStirring

Grinding

What are 3 ways to increase the rate of dissolving of a solute?

Oxygen

Suppose a reaction is occurring in a test tube. Further, suppose that a lit splint held over the test tube and the flame gets brighter. The gas in the

test tube is most likely ______.

Noble Gas

What type of element is He?

Sublimation

The change of state from a solid directly to a gas is

called ______.

Particles are spaced very far apart

Describe the particle spacing of a gas.

Unsaturated

A solution that is capable of dissolving more solute is ______.

melting

The change of state from a solid directly to a liquid is

called _____.

Particles are spaced very CLOSE together

Describe the particle spacing of a solid.

decrease

If the volume of a gas is increased, then the gas pressure

will ______.

Transition Metal

What type of element is Mn?

Ne

According to the following electron notation: 1s22s23s23p4

What element is this?

Crucible and Cover

Identify:

NO defined melting pointsNo geometric patterns

List 2 properties of an amorphous solid.

formation of a precipitateproduction of a gas

production of heat/lightColor change

What are the 4 indicators that a chemical reaction

occurred?

Double Displacement

Given the following word equation:

BaCl2 + Mg(OH)2 MgCl2 + Ba(OH)2 .

What type of reaction does this equation represent?

Synthesis

Given the following word equation:

2H2 + O2 2H2O . What type of reaction does this

equation represent?

Positive

Cations have a ____ charge

Nonpolar covalent

A bond where there is an EQUAL SHARING of electrons is ______.

Negative

Anions have a _____charge

Electronegativity

A measure of the ability of an atom to attract electrons when

bonded to another atom is called ______.

Carbon dioxide

Suppose a reaction is occurring in a test tube. Further, suppose that a lit

splint held over the test tube goes out. The gas in the test tube is most likely

______.

Bent

What is the molecular geometry of the following?:

Base

Lye turns red litmus paper blue, and blue litmus paper stays

blue. Lye is a(n) ______.

Release H+ ions in water

According to Arrhenius, acids are defined as substances that

______.

increase

If the volume of a gas is increased, then the gas temperature will ______.

Tetrahedral

What is the molecular geometry of the following?:

Acid

Vinegar turns blue litmus paper red, and red litmus paper stays

red. Vinegar is a(n) ______.

Colloids

What type of mixture exhibits the Tyndall effect?

Alkali Metal

What type of element is Na?

Fission

The process of splitting atoms is called____

Exothermic

Suppose that during the reaction a chemistry student touches the

beaker and observes that it feels HOT. The student should conclude

that the chemical reaction is ______.