Acid-Base Reactions are Neutralization Reactions When strong acid and bases with equal amounts of hydrogen ion H+ and hydroxide ions OH- are mixed, the resulting solution is neutral. HCl(aq) + NaOH(aq) ® NaCl(aq) + H2O(l) acid base salt water Ca(OH)2 + 2 HCl CaCl2 + 2H2O base acid salt water

neutralization reactions are double replacement reactions HNO3 + KOH ® HCl + Mg(OH)2 ® H2SO4 + NaOH ®

Ionic Equations for Neutralization Write strong acids, bases, and salt as ions H+ + Cl- + Na+ + OH- Na+ + Cl- + H2O Cross out matched ions Write a net ionic reaction H+ + OH- H2O

moles H3O+ = moles OH- MV n = MV n Titration M: Molarity V: volume n: # moles of H+ ions in the acid or # moles of OH- ions in the base

Titration 42.5 mL of 1.3M KOH are required to neutralize 50.0 mL of H2SO4. Find the molarity of H2SO4. H3O+ M = ? V = 50.0 mL n = 2 OH- M = 1.3M V = 42.5 mL n = 1 MVn = MVn M(50.0mL)(2) =(1.3M)(42.5mL)(1) M = 0.55M H2SO4