Fe complex pKa = 2.22
Zn complex pKa = 9.0
pKb of HCOO- = 5.6 x 10^-11 = 10.2
pKb of CH3COO- = 5.6 x 10^-10 = 9.26
for complex a) pH = 7 + 1/2 [ pKa - pKb ]
pH = 7 +1/2 (2.22 - 9.26)
pH = 3.48
for complex b) pH = 7 + 1/2 (9.0 - 10.2)
pH = 6.4
for complex c) pH = 7 + 1/2 (9.0 - 9.26)
pH = 6.87
all the pH values are less than 7. so these are all acidic salts
so answer : (d) none of them
0 NEUI UE above, 3. Which of the following solutions is basic, given the following Ka...
please show all work neatly
5. (2 pts) Consider the following acids and their dissociation constants HPO4-2(aq) + H2O.. H3O"(aq) + PO4-3(aq) Ka-2.2x 10.13 HCOOH(aq) H20 H3O (a) HCOO (aq) Ka = 1.8x10-4 a. Which is the weaker acid, HPO42 or HCOOH? b. What is the conjugate base of, HPO42 or c. Which acid has the weaker conjugate base? d. Which acid produces more ions? 6. (2 pts) Write a balanced equation for the neutralization of H3PO4(aq) and NaOH(aq) (3...
Which one of the following solutions has the lowest pH? A. a 0.1 M solution of formic acid, HCOOH (Ka = 1.8 x 10-4) B. a 0.1 M solution of ammonium chloride, NH4Cl(s) (Ka (NH4+) = 5.6 x 10-10) C. a 0.01 M solution of acetic acid, CH3COOH (Ka = 1.8 x 10-5) D. a 0.01 M solution of formic acid, HCOOH (Ka = 1.8 x 10-4) E. a 0.1 M solution of acetic acid, CH3COOH (Ka = 1.8 x...
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Given the following information: formic acid HCOOH Ka = 1.8×10-4 triethylamine (C2H5)3N Kb = 5.2×10-4 (1) Write the net ionic equation for the reaction that occurs when equal volumes of 0.167 Maqueous formic acid and triethylamine are mixed. It is not necessary to include states such as (aq) or (s). Use HCOO- as the formula for the formate ion. -reactant or product favored? -pH is >, <, = to 7?
4) (24 points) What is the solubility of Fe(OH)s (iron(III) hydroxide)... a) ...pure water? b) ...0.036 M Fe(NO3)3? Ka values: HCI HNO3 H2SO4 HSOF 113x102 HsPO7.5 x 103 HF HNO2 strong CH3COOH 1.8 x 10 CHNHF 5.9 x 106 HCO 4.2x 10 H2CO3 strong HaPO 62x 10 H2PO4 7.1 x 104 4.5 x 1 HCN HCO3 HPO4 4.9 x 10 48 x 101 1.7 x 10" HCOOH Ksp values: Mg(OH)212x 10 | AgBr _ 17,7 x10.TS- і I 8.7 x...
Given its acid dissociation constant (Ka) which of the following is the weakest acid? A-HClO2 (1.1 × 10−2) B-HCOOH (1.8 × 10−4) C- HCN (4.9 × 10−10) D-HF (3.5 × 10−4)
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Acids and Bases 1) Which of the following is a general property of a basic solution? a. feels slippery b pH less than 7 c. tastes sour d. turns litmus paper red e. none of the above 2) If a vinegar sample has a pH of 5, the solution is which of the following: a. strongly acidic b. weakly acidic c neutral d. weakly basic e. strongly basic 3) Which of the following is a weak Arrhenius acid a. HNO3...
Given the following conjugate acid-base pairs and their Ka values at 25°C, which of the following acid-base buffer systems might be found in the human body 1. HN O2/N O2- ; Ka = 4.00×10-4 2. C6H5O H/C6H5O - ; Ka = 1.30×10-10 3. H2PO41- / HPO42- ; Ka = 6.4x10-8 4. HCO3-/CO32- ; Ka = 4.7x10-11 5. CH2Br COOH/CH2Br COO- ; Ka = 2.00×10-3 6. HCN /CN - ; Ka = 6.20×10-10 7. H3PO4/H2PO42- ; Ka = 6.9x10-3 8. HCOO...
Worksheet Week 10 Name: 1. During strenuous exercise lactic acid builds up in a muscle tissues. In a 1.00 Maqueous solution 2.94% of lactic acid is ionized. What is the value of its ka? 2. At equilibrium of (H') in a 0.250 M solution of an unknown acid is 4.07 x 10 M. Determine the degree of ionization and the Ka of this acid. 3. The venom of biting ants contains formic acid, HCOOH, Ka = 1.8 x 10-Mat 25°C....