Honors chem: Chemical reactions
Exam 2025 Questions and Answers
Reactants - ANSWER-left side of the yield sign, what goes into a chemical
equation
Products - ANSWER-right side of the yield sign, what comes out of a chemical
equation
Coefficients - ANSWER-mount of substances involved
Yield/Arrow - ANSWER-reacts to produce
1 mole = - ANSWER-6.02 x 10^23 molecules
1 mole of gas = - ANSWER-22.4 litters
+ - ANSWER-used to separate two reactants or two products from each other
→ - ANSWER-yield
→
← - ANSWER-reversible
(s)(l)(g)(aq) - ANSWER-phase of matter: solid, liquid, gas, aqueous
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, ∆
→ - ANSWER-heat involved
MnO2
→ - ANSWER-catalyst, used to speed up reaction. *Not always MnO2*
↑ - ANSWER-gas given off as a product
↓ - ANSWER-solid precipitation produced
NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l) + CO2↑ - ANSWER-solid sodium
bicarbonate plus aqueous hydrochloric acid yields aqueous sodium chloride plus
water plus carbon dioxide gas
H2SO4(aq) + BaCl2(aq) → HCl(aq) + BaSo4(s) - ANSWER-aqueous sulfuric acid
plus aqueous barium chloride yields aqueous hydrochloric acid plus solid barium
sulfate
Sodium plus bromine, when heated, reacts to produce solid sodium bromide -
ANSWER-2Na(s) + Br(l) ∆ 2NaBr(s)
→
Law of Conservation of Matter (or Mass): - ANSWER-Matter is neither created
nor destroyed in chemical reactions
During a chemical reaction atoms are either ... - ANSWER-joined, separated, or
rearranged. The number of atoms stays the same
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
Exam 2025 Questions and Answers
Reactants - ANSWER-left side of the yield sign, what goes into a chemical
equation
Products - ANSWER-right side of the yield sign, what comes out of a chemical
equation
Coefficients - ANSWER-mount of substances involved
Yield/Arrow - ANSWER-reacts to produce
1 mole = - ANSWER-6.02 x 10^23 molecules
1 mole of gas = - ANSWER-22.4 litters
+ - ANSWER-used to separate two reactants or two products from each other
→ - ANSWER-yield
→
← - ANSWER-reversible
(s)(l)(g)(aq) - ANSWER-phase of matter: solid, liquid, gas, aqueous
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, ∆
→ - ANSWER-heat involved
MnO2
→ - ANSWER-catalyst, used to speed up reaction. *Not always MnO2*
↑ - ANSWER-gas given off as a product
↓ - ANSWER-solid precipitation produced
NaHCO3(s) + HCl(aq) → NaCl(aq) + H2O(l) + CO2↑ - ANSWER-solid sodium
bicarbonate plus aqueous hydrochloric acid yields aqueous sodium chloride plus
water plus carbon dioxide gas
H2SO4(aq) + BaCl2(aq) → HCl(aq) + BaSo4(s) - ANSWER-aqueous sulfuric acid
plus aqueous barium chloride yields aqueous hydrochloric acid plus solid barium
sulfate
Sodium plus bromine, when heated, reacts to produce solid sodium bromide -
ANSWER-2Na(s) + Br(l) ∆ 2NaBr(s)
→
Law of Conservation of Matter (or Mass): - ANSWER-Matter is neither created
nor destroyed in chemical reactions
During a chemical reaction atoms are either ... - ANSWER-joined, separated, or
rearranged. The number of atoms stays the same
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
