Presentation on theme: "Objectives To learn about reactions between strong acids and strong bases To learn about the reaction between a metal and a nonmetal To understand how."— Presentation transcript:
1 ObjectivesTo learn about reactions between strong acids and strong basesTo learn about the reaction between a metal and a nonmetalTo understand how electron transfer produces a chemical reaction
2 A. Reactions Between Acids and Bases Arrhenius Acids and BasesA strong acid is one in which virtually every molecule dissociates (ionizes) in water to an H+ ion and an anion.
3 A. Reactions Between Acids and Bases Arrhenius Acids and BasesA strong base is a metal hydroxide that is completely soluble in water, giving separate OH ions and cations.Most common NaOH, KOH
4 Properties of Acids and Bases Produce Hydrogen ionspH less than 7Turn Litmus paper redNeutralize basesCorrode MetalsTaste sourBasesProduce Hydroxide ionspH more than 7Turn Litmus paper blueNeutralize acids“Slippery” (proteins)Taste bitter
6 A. Reactions Between Acids and Bases Reaction Between Arrhenius Acids and BasesThe products of the reaction of a strong acid and a strong base are water and a salt (salt = ionic compound)“Acid plus base gives salt plus water”Example: HCl(aq) + KOH(aq) → H2O(l)+ KCl(aq)Net ionic equation:H+(aq) + OH−(aq) H2O(l)(WOC P273 Q22, 23)
7 B. Reactions of Metals with Nonmetals (Oxidation-Reduction) Reactions between metals and nonmetals involve a transfer of electrons from the metal to the nonmetal.oxidation – reduction reactionSodium Chlorine ReactionWhat happens to the atoms in this reaction?2Na + Cl2 → 2NaCl
8 B. Reactions of Metals with Nonmetals (Oxidation-Reduction) Oxidation Half-reaction:Reduction Half-reaction:Molecular Equation:(WOC P273 Q25,26,27)