美国高中化学酸碱反应 Acid-Base Reactions

1、中和反应中和反应Net Ionic Equations净离子方程式1) Write Complete Ionic Equation All soluble compounds are shown as free ions2) Remove Spectator Ions Ions not directly evolved in the rxn.3) Balance the remaining rxn.ACIDBASEACIDBASEConjugate acidConjugate acidConjugate baseConjugate baseAdd a strong base:HC2H3O2(a

2、q)+NaOH(aq)C2H3O2-(aq)+H2O(l)HC2H3O2(aq)+OH-(aq) C2H3O2-(aq)+H2O(l)Add a strong acid:NaC2H3O2(aq)+HCl(aq) HC2H3O2(aq)+NaCl(l)C2H3O2-(aq)+H+(aq)HC2H3O2(aq) What happens when you take in too much CO2? H2CO3 increases making blood more acidic What kind of blood pH results in yawning? Acidic blood; body

3、 needs to release large amount of CO2 by taking in large amount of O2抗酸剂抗酸剂Breaks down to CO2 and H2O滴定滴定标准溶液标准溶液酸碱指示酸碱指示剂剂End pointEquivalence pointNeutral point If 15.0 mL of 0.50 M NaOH is used to neutralize 25.0 mL of HC2H3O2, what is the molarity of the acid solution? NaOH + HC2H3O2 H2O + NaC2H

4、3O2; 1:1 ratio If 25.0 mL of a standard 0.05 M HCl solution is required to neutralize 20.0 mL of a solution of Sr(OH)2, what is the concentration of the base? MB = MAVA/2VB = (0.05 M)(25.0 ml)/(2)(20.0 ml) = 0.03 M What types of acid-base reactions do these titration graphs show? Graphs shows titration of 0.5 M NaOH with 50ml of an unknown acid. After titration NaBr salt crystals were isolated from the solution.a) What is the acid used? Is it strong or weak?b) what is the concentration of the acid used?