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Important equationspH = pK, + log[salt],[acid]pOH = pKb + log[salt]/[base]acidicbasicpKalog KapK,log KbAcidAcetic acidBenzoic acidCH2COOHCsH5COOHHCOOHKa1.8 x 10-5Sodium saltNaCH3COCNaC6H.СООNaCN| 63 X 10-5Hydrocyanic acid HCNFormic acidHypobromous acid HOBrHypochlorous acid HOCHypoiodous acidNitrous acidChlorous acid HCIO26.2 x 10-101.8 x 10-4 NaHCOO2.3 x 109NaOBrNaOClNaOINaNO22.9 x 10-82.3 X 10-117,1 x 10-41.1 x 10-2HNO2Chlorous acidNaCIO2*Table values from Silberberg, 4th EditionSolve the following problems1. Find the pH of a buffer in which [HCOOH] 1.24 M and [HCOONa] 0.82 MGiven that Buffer A contains 20o.o mL o.050 M HOCl and 400.0 mL o.030 M NaoClcalculate2.a.The pH of the buffer solutionb. The pH of the solution after adding 10.0 mL 0.50 M HC.c. The pH of the solution after adding 20.0 mL o.40 M NaOH

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Important equations
pH = pK, + log[salt],[acid]
pOH = pKb + log[salt]/[base]
acidic
basic
pKalog Ka
pK,log Kb
Acid
Acetic acid
Benzoic acid
CH2COOH
CsH5COOH
HCOOH
Ka
1.8 x 10-5
Sodium salt
NaCH3COC
NaC6H.СОО
NaCN
| 63 X 10-5
Hydrocyanic acid HCN
Formic acid
Hypobromous acid HOBr
Hypochlorous acid HOC
Hypoiodous acid
Nitrous acid
Chlorous acid HCIO2
6.2 x 10-10
1.8 x 10-4 NaHCOO
2.3 x 109
NaOBr
NaOCl
NaOI
NaNO2
2.9 x 10-8
2.3 X 10-11
7,1 x 10-4
1.1 x 10-2
HNO2
Chlorous acid
NaCIO2
*Table values from Silberberg, 4th Edition
Solve the following problems
1. Find the pH of a buffer in which [HCOOH] 1.24 M and [HCOONa] 0.82 M
Given that Buffer A contains 20o.o mL o.050 M HOCl and 400.0 mL o.030 M NaoCl
calculate
2.
a.
The pH of the buffer solution
b. The pH of the solution after adding 10.0 mL 0.50 M HC.
c. The pH of the solution after adding 20.0 mL o.40 M NaOH
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Important equations pH = pK, + log[salt],[acid] pOH = pKb + log[salt]/[base] acidic basic pKalog Ka pK,log Kb Acid Acetic acid Benzoic acid CH2COOH CsH5COOH HCOOH Ka 1.8 x 10-5 Sodium salt NaCH3COC NaC6H.СОО NaCN | 63 X 10-5 Hydrocyanic acid HCN Formic acid Hypobromous acid HOBr Hypochlorous acid HOC Hypoiodous acid Nitrous acid Chlorous acid HCIO2 6.2 x 10-10 1.8 x 10-4 NaHCOO 2.3 x 109 NaOBr NaOCl NaOI NaNO2 2.9 x 10-8 2.3 X 10-11 7,1 x 10-4 1.1 x 10-2 HNO2 Chlorous acid NaCIO2 *Table values from Silberberg, 4th Edition Solve the following problems 1. Find the pH of a buffer in which [HCOOH] 1.24 M and [HCOONa] 0.82 M Given that Buffer A contains 20o.o mL o.050 M HOCl and 400.0 mL o.030 M NaoCl calculate 2. a. The pH of the buffer solution b. The pH of the solution after adding 10.0 mL 0.50 M HC. c. The pH of the solution after adding 20.0 mL o.40 M NaOH

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