Chemical Reactions Quiz

Reactant

• The starting substances in a chemical reaction

• Located on the left side of a chemical equation

Product

• The new substances formed at the end of a chemical reaction

• Located on the right side of a chemical equation

Chemical Equation

• Represents chemical change / chemical reaction

• A combination of chemical formulas, numbers and symbols that represents the change

• It is the WHOLE thing

  • Ex. 2H₂ + O₂ - 2H₂O

• ALWAYS THE SAME FORM - REACTANTS TO PRODUCTS

Chemical Formula

• Represents the constituent elements and their ratios in a molecule or compound

• Ex. Glucose’s chemical formula is C₆H₁₂O₆

  • Another ex. Oxygen Gas is O₂

Coefficient

• Large numbers in front of each formula

• In order to balance an equation, use only coefficients to make changes so the number of each type of atom matches

• 3CO₂ + 2Na - 3O₂ + 2Na + 3C

Subscript

• Small numbers written to the lower right of a chemical symbol

• Represent the number of atoms of that specific element present in a molecule or formula unit

• Ex. CO₂ - The 2 is the subscript