Chemical Reactions and Balancing

What is a chemical equation?

• A representation of a chemical reaction using symbols and formulas.

• A type of chemical bond between atoms.

• A method for measuring the temperature of a reaction.

• A visual diagram of molecular structures.

What is an exothermic reaction?

• A reaction that absorbs energy in the form of heat.

• A reaction that releases energy in the form of heat.

• A reaction that occurs at a constant temperature.

• A reaction that requires a catalyst to proceed.

What is the law of conservation of mass?

• In a chemical reaction, mass is neither created nor destroyed.

• Mass can be created or destroyed in a chemical reaction.

• The total mass of products is always greater than the total mass of reactants.

• Mass is only conserved in physical changes, not chemical changes.

What is a combustion reaction?

• A reaction that involves the burning of a substance in the presence of oxygen.

• A reaction that absorbs heat and does not produce light.

• A reaction that occurs only in the absence of oxygen.

• A reaction that produces a gas without any heat change.

What is a decomposition reaction?

• A reaction where two or more compounds combine to form a single product.

• A reaction where a single compound breaks down into two or more simpler products.

• A reaction that involves the transfer of electrons between two species.

• A reaction that occurs only in the presence of a catalyst.

What is a combination reaction?

• A reaction where two or more substances combine to form a single product.

• A reaction where a single substance breaks down into two or more products.

• A reaction that involves the exchange of ions between two compounds.

• A reaction that occurs in the presence of light or heat.

What are products in a chemical reaction?

• Substances formed as a result of a chemical reaction.

• The starting materials in a chemical reaction.

• The energy released during a chemical reaction.

• The catalysts used to speed up a chemical reaction.

What type of reaction is the equation Cu + 2Ag(NO3) → 2Ag + Cu(NO3)?

• Single Replacement

• Double Replacement

• Combustion

• Decomposition

What reaction has the following general formula: A + CD --> C + AD?

• Single Replacement

• Double Replacement

• Combustion

• Synthesis

What is a double replacement reaction?

• A reaction where two compounds exchange ions to form two new compounds.

• A reaction where one element replaces another in a compound.

• A reaction that involves the breaking of chemical bonds without forming new compounds.

• A reaction that occurs only in gaseous states.