Acids, bases, and neutralization

In an acid-base reaction, an acid donates a proton and a base accepts a proton. In a simple strong-acid, strong-base neutralization, hydrogen ions and hydroxide ions form water. Equal reacting amounts matter more than equal liquid volumes. One mole of hydrochloric acid can neutralize one mole of sodium hydroxide. If both solutions have the same concentration, equal volumes supply equal reacting amounts. Unequal concentrations require different volumes.