Reaction Types
What type of reaction occurs when one compound breaks down into two or more simpler substances?
Decomposition reaction
What type of reaction occurs when cooking gas burns?
Combustion
Write the symbol equation for hydrogen reacting with oxygen to form water.
H₂ + O₂ → H₂O
What process allows plants to use light energy to produce glucose?
Photosynthesis
What term refers to all chemical reactions that occur within a living organism?
Metabolism
What type of reaction occurs when a substance burns in oxygen and releases energy?
Combustion reaction
What gas causes bubbles when vinegar reacts with baking soda?
Carbon dioxide
Write the symbol equation for magnesium reacting with oxygen to form magnesium oxide.
Mg + O₂ → MgO
What two reactants are needed for photosynthesis?
Carbon dioxide and water, with light energy.
What branch of metabolism breaks down complex substances into simpler ones and releases energy?
Catabolism
What are the three products of an acid reacting with a carbonate?
Salt, water, and carbon dioxide
Baking soda reacts with an acidic ingredient and releases a gas that helps baked goods rise. What gas is produced?
Carbon dioxide
Write the symbol equation for calcium carbonate decomposing into calcium oxide and carbon dioxide.
CaCO₃ → CaO + CO₂
What are the three main products of cellular respiration when glucose undergoes aerobic respiration?
Carbon dioxide, water, and usable energy (ATP).
What branch of metabolism builds complex substances from simpler ones and requires energy?
Anabolism
What are the two products of an acid reacting with a reactive metal?
Salt and hydrogen gas
What happens when vinegar reacts with baking soda?
It produces carbon dioxide gas, water, and a salt.
Write the symbol equation for zinc reacting with hydrochloric acid to form zinc chloride and hydrogen gas.
Zn + HCl → ZnCl₂ + H₂
Write the balanced chemical equation for photosynthesis.
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂, in the presence of light.
What is the importance of metabolism in the human body?
It provides energy and supports growth, tissue repair, and normal body functions.
Identify the reaction type: CaCO₃ → CaO + CO₂
Decomposition reaction
A student mixes vinegar with crushed eggshells and observes bubbles. Identify the type of reaction and the gas produced.
Acid–carbonate reaction; carbon dioxide gas.
Write the symbol equation for methane reacting with oxygen to form carbon dioxide and water.
CH₄ + O₂ → CO₂ + H₂O
Write the balanced chemical equation for cellular respiration.
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy.
Building proteins from amino acids requires energy. Is this anabolism or catabolism, and why?
Anabolism, because simpler substances are joined to build a more complex substance.