Detailed A+ Answers
< (Latest 2025 Edition | Comprehensive Study
Guide) >
What are the reactants and products in a chemical reaction? - ANSWER Reactants are on the
left side of the equation; Products are on the right.
How can you tell if a chemical reaction is balanced? - ANSWER A balanced equation has
equal numbers of each type of atom on both sides.
What are the five types of chemical reactions? - ANSWER 1. Synthesis: A + B → AB; 2.
Decomposition: AB → A + B; 3. Single Replacement: AB + C → CB + A; 4. Double Replacement:
AB + CD → AD + CB; 5. Combustion: CxHyOz + O₂ → CO₂ + H₂O.
,What is the law of conservation of mass? - ANSWER Atoms are neither created nor
destroyed; they are rearranged.
What is the formula for photosynthesis? - ANSWER 6CO2(g) + 6H2O(l) → C6H12O6(s) +
6O2(g).
What are the effects of CFCs on the ozone layer? - ANSWER CFCs break apart under UV
radiation, releasing chlorine that destroys ozone; 1 Cl atom destroys 100,000 ozone molecules.
What is ocean acidification? - ANSWER The process where CO2 from the atmosphere forms
carbonic acid in the ocean, decreasing pH and causing negative effects on marine ecosystems.
What is Bowen's reaction series? - ANSWER A series that ranks common silicate igneous
minerals by the temperature at which they crystallize.
What happens to the melting point of minerals as silica content increases? - ANSWER An
increase in silica lowers the melting point.
,How do you convert a word equation into a chemical equation? - ANSWER Identify the
reactants and products, then write their chemical formulas and balance the equation.
What is the impact of increased atmospheric CO2 on plants? - ANSWER Higher CO2 levels
can increase temperature, making conditions inhospitable for many plants, thus reducing
photosynthesis effectiveness.
What is the significance of balancing chemical equations? - ANSWER Balancing ensures that
the same number of atoms of each element is present on both sides, reflecting the conservation
of mass.
What is the difference between acidic, basic, and neutral solutions in terms of pH? - ANSWER
Acidic solutions have a pH less than 7, basic solutions have a pH greater than 7, and neutral
solutions have a pH of 7.
What is the role of sunlight in photosynthesis? - ANSWER Plants use sunlight to produce
glucose in their chloroplasts.
, What are the consequences of lower pH in ocean water? - ANSWER Lower pH increases
ocean acidity, which can cause coral bleaching and disrupt marine ecosystems.
What is the formula for carbonic acid formation in ocean acidification? - ANSWER CO2 [g] +
H2O [l] → H2CO3 [aq].
What is the result of carbonic acid dissolving in water? - ANSWER It releases H+ ions,
leading to a decrease in ocean pH.
What is the relationship between mineral crystallization and silica content? - ANSWER
Minerals at the bottom of Bowen's reaction series have higher silica content and lower
melting points.
How do you determine the total number of atoms in a chemical formula? - ANSWER Count
the number of each type of atom represented in the formula.
What is the outcome of a combustion reaction? - ANSWER It always produces CO₂ and H₂O.