lecture analytical chem

lecture analytical chem - Monoprotic Acid Tit ration[H =...

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Monoprotic Acid ¼ Titration, [H+] = 3Ka, ½ pH=pKa, ¾ Ka/3 = [H+], E.p [OH] = Square root [(Kw/Ka) [salt]] Diprotic Acid. ¼ , pH=Pka, ½ H=pKa1+pKa2/2, ¾ pH= pKa2, E.p [OH]= Square root[(Kw/Ka2)[salt]] Triprotic Acid 1/6 pH=Pka1, 1/3 pH=PKa1+pKa2/2, ½ pH=pKa2, 2/3 pH=Pka2+Pka3/2, 5/6 pH= PKa3 E.P, [OH]= Square root[(Kw/Ka3)[salt]]. Absolute Error: Square root(s1^2+s2^2+s3^2) Relative Errror: Absoute Error/value X 100, Value= (add all coefficient) 1) Calculate M and N of KmnO4? 5AsO3- + 2MnO4- + 6H+ 5AsO4^-3 + 2Mn+2 + 3H2O As2O3 + 6NaOH 6Na+ + 2AsO3^-7 + HCL H3ASO3 2AS2O3. 200.0mg As2O3(1.0003) X 1mol/197.88 = 1.01557 X 2= 2.031 mmol As2O3. 2.031 mmol As2O3 X 2mmol MnO4/5mmol As2O3 = 0.81245 mmol MnO4-. M=0.81245/38.93mL = 0.02087M N=n(M)=5(0.02087)=0.1043N.
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lecture analytical chem - Monoprotic Acid Tit ration[H =...

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