Simulations & Videos for

Lesson 6.2: Controlling the Amount of Products in a Chemical Reaction


  • Vinegar is acetic acid (C2H4O2) and water. Acetic acid is made of 2 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms.
  • Baking soda is sodium bicarbonate (NaHCO3). Sodium bicarbonate is made of 1 sodium ion, 1 hydrogen atom, 1 carbon atom, and 3 oxygen atoms.


  • One of the products of the vinegar and baking soda reaction is sodium acetate (NaC2H3O2).
  • Sodium acetate is made of 1 sodium ion, 2 carbon atoms, 3 hydrogen atoms, and 2 oxygen atoms.
  • The other products are water (H2O) and carbon dioxide (CO2).

Mass is Conserved

  • All of the atoms in the reactants are in the products.
  • The mass of the reactants and products is the same.

Controlling Amount of Products Formed

  • Adding more of one reactant will make more products as long as there is still enough of the other reactant to react.
  • If you add more and more of one reactant the other will eventually run out and no more products will be formed.