What is the Ka value for each of the compounds? Express the answers in proper scientific notation. A. Determine the K₂ value for the compound with pKa = 10.26. H3C- OH B. Determine the K₂ value for the compound with pK₂ = 16.50. OH C. Determine the K₂ value for the compound with pKa = 5.21. K₁ = Ka = K₁ =

c. Explain the difference of pka of the following two compounds Overcas trans are pka H HADICH 35 Η Н han cis 43 I I H Ye more stable than 1 XX

Type Formula Ksp Bromides PbBr2 6.3 × 10-6 AgBr 3.3 × 10-13 Carbonates BaCO3 8.1 × 10-9 CaCO3 3.8 × 10-9 CoCO3 8.0 × 10-13 CuCO3 2.5 × 10-10 FeCO3 3.5 × 10-11 PbCO3 1.5 × 10-13 MgCO3 4.0 × 10-5 MnCO3 1.8 × 10-11 NiCO3 6.6 × 10-9 Ag2CO3 8.1 × 10-12 ZnCO3 1.5 × 10-11 Chlorides PbCl2 1.7 × 10-5 AgCl 1.8 × 10-10 Chromates BaCrO4 2.0 × 10-10 CaCrO4 7.1 × 10-4 PbCrO4 1.8 × 10-14 Ag2CrO4 9.0 × 10-12 Cyanides Ni(CN)2 3.0 × 10-23 AgCN 1.2 × 10-16 Zn(CN)2 8.0 × 10-12 Fluorides BaF2 1.7 × 10-6 CaF2 3.9 × 10-11 PbF2 3.7 × 10-8 MgF2 6.4 × 10-9 Hydroxides AgOH 2.0 × 10-8 Al(OH)3 1.9 × 10-33 Ca(OH)2 7.9 × 10-6 Cr(OH)3 6.7 × 10-31 Co(OH)2 2.5 × 10-16 Cu(OH)2 1.6 × 10-19 Fe(OH)2 7.9 × 10-15 Fe(OH)3 6.3 × 10-38 Pb(OH)2 2.8 × 10-16 Mg(OH)2 1.5 × 10-11 Mn(OH)2 4.6 × 10-14 Ni(OH)2 2.8 × 10-16 Zn(OH)2 4.5 × 10-17 Iodides PbI2 8.7 × 10-9 AgI 1.5 × 10-16 Oxalates BaC2O4 1.1 × 10-7 CaC2O4…

9. Assume the exact mass for compound X is 151.9472. a. What is the molecular formula, b. What is the index of hydrogen deficiency. 73 100 90 80- 70- 60- 50 40에 152 30- 20- 107 135 55 10- 26 18 0- 10 150 160 170 20 30 40 50 60 70 80 90 100 110 120 130 140 30- 25- 20- 15- 10어 3500 3000 2500 2000 1500 1000 Wavenumber (cm-1) c. Draw 2 structures that are consistent with the data -812 914 -1137 1265 --1342 -1395 1432 1717 -2571 -2670 3067 Transmittance

Balance each side

B 50ng/ml C500 ng/ml

For numbers 24-25: A solution contains NaHCO3, Na2CO3, and NaOH, either alone or in a permissible combination. Titration of a 50.0 mL portion to a phenolphthalein end point requires 22.1 mL of 0.100 M HCI. A second 50.0-mL aliquot requires 48.4 mL of the HCI when titrated to a bromocresol green end point. 24. What is the composition of the sample? A. NaOH only B. Na2CO3 only C. NaOH and Na2CO3 D. Na₂CO3 and NaHCO3 nol 25. What are the concentrations of the components of the sample? A. 0.0084 M NaOH B. 0.0442 M Na2CO3 C. 0.0084 M NaOH and 0.0442 M Na2CO3 D. 0.0442 M Na2CO3 and 0.0084 M NaHCO3

(22) 1. NH2 2. AI3 NH2 12 3. NaOH, H,0,A (3) OH. Z.(H9), HCL O KMNO4, NAOH, D