WGU D425 INTRO TO CHEMISTRY
OBJECTIVE ASSESSMENT
ACTUAL EXAM 2025/2026
ACCURATE QUESTIONS WITH
CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
what is the name of the acid with the formula
HNO2 - ANSWER Nitrous acid. Nitrite is the
anion, and when the anion ends in
-ite, the name of the acid is the root of the anion
followed by the suffix -ous
which substance is a proton donor - ANSWER an
acid- any compound that can transfer a proton to
any other compound is an acid
what defines a strong base - ANSWER a base that
dissociates completely in water. strong bases
dissociate 100% in water to produce H+ ions
what is the definition of the equivalence point in
titration - ANSWER the point at which the amount
of titrant added is just enough to completely
neutralize the analyte solution. Or measuring the
volume of titrant solution required for complete
,reaction with the analyte allows calculation of the
analyte concentration.
if 100.00 mL of a sulfuric acid solution (H2SO4)
is neutralized by 50.0ml of a 0.50 M barium
hydroxide solution (Ba(OH)s) what is the
concentration of the sulfuric acid solution (H2SO4)
H2SO4 (aq) + Ba(OH)2 (aq) -> BaSO4 (s) + 2
H2O(l) - ANSWER
how many electrons would magnesium (Mg) lose
in an acid-base reaction with Hydrochloric acid
(HCl) - ANSWER 2. alkaline earth metals, like
magnesium, have 2 valence electrons in their outer
most shell that are given up in a reaction
what is formed when an acid reacts with a metal
hydrogen carbonate - ANSWER a salt, carbon
dioxide gas, water.
salt contains HCO3- and CO2- accept one and two
protons, respectively, from acids to make H2CO3.
Next H2CO3 decompensates to carbon dioxide and
water by the reverse reaction
according to the Arrhenius concept, what does an
acid do? - ANSWER it increases the concentration
of H+ in an aqueous solution ( when dissolved in
water)
, what is the name for ions that do not participate in
chemical reactions - ANSWER spectator ions. the
cation of the base and the anion are inactive in the
chemical reactions and are referred to as spectator
ions
what occurs when the reversible reaction
N2 (g) + O2 (g) <--> 2NO (g) has reached a state
of equilibrium - ANSWER the concentration of
each substance in the system will be constant.
chemical reaction in the forward direction leading
to produce formation and chemical reaction in the
reverse direction leading to reactant formation will
continue. the rate for both forward and reverse
processes will become equal . if the rates are equal,
then the concentration of each substance in the
system will be constant
proper description of chemical equilibrium -
ANSWER rates of forward and reverse reaction are
identical.
According to the Arrhenius concept, what does an
acid do - ANSWER It increases the concentration
of H+ in an aqueous solution
What is the name for ions that do not participate in
chemical reactions? - ANSWER Spectator ions
, What is the term used to describe two solvents that
mix in any proportion to produce a solution? -
ANSWER Miscible
What is a formula for measuring concentration in
percentage? - ANSWER Mass/total mass x100
K>1 - ANSWER equilibrium position shifts to the
right and products will predominate.
Removal of the product - ANSWER would shift
the equilibrium to the right leading to formation of
more products.
K<1 - ANSWER equilibrium position shifts to the
left and reactants will predominate.
According to Dalton's atomic theory, what
happens to atoms in a chemical reaction? -
ANSWER They are combined.
They are separated
They are rearranged.
How are the groups (columns) in the periodic table
organized? - ANSWER In vertical columns based
on the organization of the outer shell electrons
Which sequence lists the arrangement of electrons
within an atom from largest to smallest? -
ANSWER Shell, subshell, orbitals, electrons
OBJECTIVE ASSESSMENT
ACTUAL EXAM 2025/2026
ACCURATE QUESTIONS WITH
CORRECT DETAILED ANSWERS ||
100% GUARANTEED PASS
<NEWEST VERSION>
what is the name of the acid with the formula
HNO2 - ANSWER Nitrous acid. Nitrite is the
anion, and when the anion ends in
-ite, the name of the acid is the root of the anion
followed by the suffix -ous
which substance is a proton donor - ANSWER an
acid- any compound that can transfer a proton to
any other compound is an acid
what defines a strong base - ANSWER a base that
dissociates completely in water. strong bases
dissociate 100% in water to produce H+ ions
what is the definition of the equivalence point in
titration - ANSWER the point at which the amount
of titrant added is just enough to completely
neutralize the analyte solution. Or measuring the
volume of titrant solution required for complete
,reaction with the analyte allows calculation of the
analyte concentration.
if 100.00 mL of a sulfuric acid solution (H2SO4)
is neutralized by 50.0ml of a 0.50 M barium
hydroxide solution (Ba(OH)s) what is the
concentration of the sulfuric acid solution (H2SO4)
H2SO4 (aq) + Ba(OH)2 (aq) -> BaSO4 (s) + 2
H2O(l) - ANSWER
how many electrons would magnesium (Mg) lose
in an acid-base reaction with Hydrochloric acid
(HCl) - ANSWER 2. alkaline earth metals, like
magnesium, have 2 valence electrons in their outer
most shell that are given up in a reaction
what is formed when an acid reacts with a metal
hydrogen carbonate - ANSWER a salt, carbon
dioxide gas, water.
salt contains HCO3- and CO2- accept one and two
protons, respectively, from acids to make H2CO3.
Next H2CO3 decompensates to carbon dioxide and
water by the reverse reaction
according to the Arrhenius concept, what does an
acid do? - ANSWER it increases the concentration
of H+ in an aqueous solution ( when dissolved in
water)
, what is the name for ions that do not participate in
chemical reactions - ANSWER spectator ions. the
cation of the base and the anion are inactive in the
chemical reactions and are referred to as spectator
ions
what occurs when the reversible reaction
N2 (g) + O2 (g) <--> 2NO (g) has reached a state
of equilibrium - ANSWER the concentration of
each substance in the system will be constant.
chemical reaction in the forward direction leading
to produce formation and chemical reaction in the
reverse direction leading to reactant formation will
continue. the rate for both forward and reverse
processes will become equal . if the rates are equal,
then the concentration of each substance in the
system will be constant
proper description of chemical equilibrium -
ANSWER rates of forward and reverse reaction are
identical.
According to the Arrhenius concept, what does an
acid do - ANSWER It increases the concentration
of H+ in an aqueous solution
What is the name for ions that do not participate in
chemical reactions? - ANSWER Spectator ions
, What is the term used to describe two solvents that
mix in any proportion to produce a solution? -
ANSWER Miscible
What is a formula for measuring concentration in
percentage? - ANSWER Mass/total mass x100
K>1 - ANSWER equilibrium position shifts to the
right and products will predominate.
Removal of the product - ANSWER would shift
the equilibrium to the right leading to formation of
more products.
K<1 - ANSWER equilibrium position shifts to the
left and reactants will predominate.
According to Dalton's atomic theory, what
happens to atoms in a chemical reaction? -
ANSWER They are combined.
They are separated
They are rearranged.
How are the groups (columns) in the periodic table
organized? - ANSWER In vertical columns based
on the organization of the outer shell electrons
Which sequence lists the arrangement of electrons
within an atom from largest to smallest? -
ANSWER Shell, subshell, orbitals, electrons
