chemical reaction

• Chemical equations

  • symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae.
• Reactants

  • The starting materials. These are the substances that change when it is combined with another substance in a chemical reaction
• Products

  • The new substance. The substances that result from the chemical reaction.
• Coefficient

  • is a number before the symbol or formula of a substance
• Subscript

  • is the number of atoms of the element found in the substance
• LAW OF CONSERVATION OF MASS

  • States that mass is neither created nor destroyed in any ordinary chemical reaction.
  • The sum of the masses of the products is always the same as the sum of the masses of the reactants.
• used to separate one reactant or product from one another

  
• • used to separate the reactants from the products
  • read as "yields" or "produces" in an equation

  
• • indicates that the substance is in the solid state

  
• • indicates that the substance is in the liquid state.

  
• • indicates that the substance is in the gas state.

  
• • indicates that the substance is dissolved in water
  • comes from the term “aqueous”

  
• indicates that there is heat applied or needed to make the reaction proceed.