Friday, May 6 th : “A” Day Agenda. Homework questions/problems/collect Quiz over section 15.2: “Acidity, Basicity, and pH” Section 15.3: “Neutralizations and Titrations” Neutralization reaction, equivalence point, titration, titrant, standard solution, transition range, end point Homework:
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H3O+(aq) + OH−(aq) 2 H2O(l)
*correct*
HCl + NaOH NaCl + H2O
(C Acid)(V Acid) = (C Base) (V Base)
A student titrates 40.00 mL of an HCl solution of unknown concentration with a 0.5500 M NaOH solution. The volume of base solution needed to reach the equivalence point is 24.64 mL. What is the concentration of the HCl solution in moles/liter?
(CAcid) (VAcid) = (CBase) (VBase)
NaOH Na + + OH-
0.5500 M0.5500 M
(CAcid) (VAcid) = (CBase) (VBase)
C(acid) = 0.3388 mol/L
If 72.1 mL of 0.543 M H2SO4 completely titrates 39.0 mL of KOH solution, what is the molarity of the KOH solution?
H2SO4 + 2 H2O SO42- + 2 H3O +
0.543 M 1.086 M
(CAcid) (VAcid) = (CBase) (VBase)
C(acid) = 1.086 M
V(acid) = 72.1 mL = .0721 L
C(base) = ?
V(base) = 39.0 mL = .0390 L
(1.086 M) (.0721 L) = (C Base) (.0390L)
C(base) = 2.01 M
Looking Ahead:
U of I 3D-Printing Presentation on Tuesday!
Titration lab on Thursday
No Flip-Flops!