Homework Answers
Larger the Ka value - higher the strength of acid
from top to bottom acid strength decreasing
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4. Using Table 15B-4, indicate the stronger acid in each pair. a. HI, H, SO b....
the table for problem 5 is attached S. Consider the weak acids in Table 13.2. Which...
the table for problem 5 is attached
S. Consider the weak acids in Table 13.2. Which acid-base pair would be best for a buffer at a pH of: a) 3.5 b) 7.3 c) 10.0 To make a buffer with pH 3.0 from HCHO2 and CHO2: a) what must the [HCHO2]/[CHO2] ratio be? 6. ep b) how many moles of HCHO2 must be added to a liter of 0.139 M NaCHO2 to give this pH? c) how many grams of NaCHO2...
4. (4 points) Complete each of the acid base reactions below and determine which direction the...
4. (4 points) Complete each of the acid base reactions below and determine which direction the reaction will favor. Use the Ka table below. a. NH" + CO2 b. HCN + H2PO4 → c. CH,COOH + HS → d. H2S + HCO » КА 7.5 x 10 Acid H3PO4 CH,COOH H.CO, HS 1.8 x 10% 4.3 x 107 9.1 x 10% 6.2 x 10* 6.2 x 10-10 5.6 x 10-0 H PO. HCN NH.
Using the K values in the table below, calculate the pH of a buffer that contains...
Using the K values in the table below, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base. 0.72 M Na HPO and 0.38 M Na PO pH Table 9.6 Common Buffers Buffer Weak Acid Conjugate Base к, Acetic acid/acetate CH-соон сн,соо" 1.8 x 10-5 Bicarbonate/carbonate HCO, co 5.6 x 10-11 Dihydrogen phosphate/ hydrogen phosphate H.PO HPO 6.2 x 10 Hydrogen phosphate/ phosphate HPO PO 2.2x 10-13
What is the pH of a buffer solution containing 0.13 M HF and 5.0×10−2 M NaF?...
What is the pH of a buffer solution containing 0.13 M HF and
5.0×10−2 M NaF?
What is the pH of a buffer solution containing
1.0×10−2 M HF and 0.16 M NaF?
Using the table given below for Ka values, compare the pH of an HF buffer that contains 0.13 MHF and 5.0x10-2 M NaF with another HF buffer that contains 1.0x10-2 MHF and 0.16 M NaF. Ka and K b values for selected weak acids and bases HF Acid...
What is the pH of a solution made by dissolving 4.8 g of K2CO3 and 6.6...
What is the pH of a solution made by dissolving 4.8 g of
K2CO3 and 6.6 g of KHCO3 in 500.
mL of water?
**ACID BASE TABLE** ->
refer to table for values
Acid Name Conjugate Acid ka pka Conjy Conjugate Base Base Name perchloric acid HCIO4 >>1 perchlorate ion hydrohalic acid HX (X=1,Br, CI) halide ion sulfuric acid >>1 hydrogen sulfate ion nitric acid >>1 nitrate ion H2804 HNO3 || 1307+ To coa >>1 <0 x1- >> RO HS044-...
Acid H SO H.O2 HF HCIO CH OH Conjugate Base HSO HO F CIO C H...
Acid H SO H.O2 HF HCIO CH OH Conjugate Base HSO HO F CIO C H 0 Ka 1.5x10-2 2.4x10-12 3.5x10-4 3.0x10 1.3x10-10 3. For the given table above, list the bases from weakest to strongest. (8pts) Show sample work.
pKa Conjugate base Acid formula Conjugate base name Acid name F3CCOOH 0.20 F3ccoo trifluoroacetic acid trifluoroacetate...
pKa Conjugate base Acid formula Conjugate base name Acid name F3CCOOH 0.20 F3ccoo trifluoroacetic acid trifluoroacetate ion 13.80 Cl3CCOOH 13.34 0.66 Cl3CCOO trichloroacetic acid trichloroacetate ion HOOCCOOH 1.23 HOOCCOO oxalic acid hydrogen oxalate ion 12.77 Cl2HCCOOH 12.70 dichloroacetic acid 1.30 Cl2HCCOO dichloroacetate ion H2SO3 12.23 1.77 HSO3 sulfurous acid hydrogen sulfite ion 1.92SO42- HSO4 hydrogen sulfate ion sulfate ion 12.08 HCIO2 1.95 CI02 chlorous acid chlorite ion 2.12 H2PO.4 phosphoric acid H3PO dihydrogen phosphate ion 11.88 CIH2CCOOH 2.87 CIH2CCOO 11.13...
TABLE 15.5 Acid lonization Constants (K) for Some Monoprotic Weak Acids at 25 °C Acid Formula...
TABLE 15.5 Acid lonization Constants (K) for Some Monoprotic Weak Acids at 25 °C Acid Formula Structural Formula lonization Reaction К. pk, = -log (2) Chlorous acid HCIO H-0-C=0 1.1 x 10-2 1.96 Stronger acids Nitrous acid HNOZ H-O-NO 5.6 x 10-4 HCIO2(aq) + H2011) = H30* (aq) + CO2 (aq) HNO2(aq) + H20(I) = H30+ (aq) + NO2 (aq) HF(aq) + H20(1) = H30* (aq) + F"(aq) 3.25 Hydrofluoric acid HF H-F 6.3 x 10-4 3.20 O Methanoic acid...
As for the circled answer I'm not sure if that's the correct one so please explain how we get the answer. Thanks in adv...
As for the circled answer I'm not sure if that's the correct one so
please explain how we get the answer. Thanks in advance!
Calculate the pH of 0.10M solutions of the following Substances. Based on your calculations, Circle the solution that is the most basic? a) (CoHs NH3) No3 6) Na CC + HBO₂) c) NaNO3 pH- Adid lodic acid Comous acid Cute and Niusad Hydrofluoriid Formic acid Bad Hydraznic acid Acetic acid Hypochlorous acid Hydrocyanic acid но HCO,...
59. Based on the information found in Table 16.2 with respect to K, which statement is...
59. Based on the information found in Table 16.2 with respect to K, which statement is true? Page 12 TABLE 16.2 Some Weak Acids in Water at 25°C Structural Conjugate Acid Formula Equilibrium Reaction K Hydrofluoric (HF) HF + HO HO + F 68 x 10-4 Nitrous HO-NO NO, HNO (M) + H200 H304) + NO:) 5 x 10+ CHNO) Benzo GH.0, HCH. + H.-H,0) + CH.063 X 10 CHCH,0) Acetic H-0----HC,H,O, HCH,000+ HODH,00) + CH,0) 18 109 CHCH.O.) Hypochlorus...
the table for problem 5 is attached
S. Consider the weak acids in Table 13.2. Which acid-base pair would be best for a buffer at a pH of: a) 3.5 b) 7.3 c) 10.0 To make a buffer with pH 3.0 from HCHO2 and CHO2: a) what must the [HCHO2]/[CHO2] ratio be? 6. ep b) how many moles of HCHO2 must be added to a liter of 0.139 M NaCHO2 to give this pH? c) how many grams of NaCHO2...
4. (4 points) Complete each of the acid base reactions below and determine which direction the reaction will favor. Use the Ka table below. a. NH" + CO2 b. HCN + H2PO4 → c. CH,COOH + HS → d. H2S + HCO » КА 7.5 x 10 Acid H3PO4 CH,COOH H.CO, HS 1.8 x 10% 4.3 x 107 9.1 x 10% 6.2 x 10* 6.2 x 10-10 5.6 x 10-0 H PO. HCN NH.
Using the K values in the table below, calculate the pH of a buffer that contains the given concentrations of a weak acid and its conjugate base. 0.72 M Na HPO and 0.38 M Na PO pH Table 9.6 Common Buffers Buffer Weak Acid Conjugate Base к, Acetic acid/acetate CH-соон сн,соо" 1.8 x 10-5 Bicarbonate/carbonate HCO, co 5.6 x 10-11 Dihydrogen phosphate/ hydrogen phosphate H.PO HPO 6.2 x 10 Hydrogen phosphate/ phosphate HPO PO 2.2x 10-13
What is the pH of a buffer solution containing 0.13 M HF and
5.0×10−2 M NaF?
What is the pH of a buffer solution containing
1.0×10−2 M HF and 0.16 M NaF?
Using the table given below for Ka values, compare the pH of an HF buffer that contains 0.13 MHF and 5.0x10-2 M NaF with another HF buffer that contains 1.0x10-2 MHF and 0.16 M NaF. Ka and K b values for selected weak acids and bases HF Acid...
What is the pH of a solution made by dissolving 4.8 g of
K2CO3 and 6.6 g of KHCO3 in 500.
mL of water?
**ACID BASE TABLE** ->
refer to table for values
Acid Name Conjugate Acid ka pka Conjy Conjugate Base Base Name perchloric acid HCIO4 >>1 perchlorate ion hydrohalic acid HX (X=1,Br, CI) halide ion sulfuric acid >>1 hydrogen sulfate ion nitric acid >>1 nitrate ion H2804 HNO3 || 1307+ To coa >>1 <0 x1- >> RO HS044-...
Acid H SO H.O2 HF HCIO CH OH Conjugate Base HSO HO F CIO C H 0 Ka 1.5x10-2 2.4x10-12 3.5x10-4 3.0x10 1.3x10-10 3. For the given table above, list the bases from weakest to strongest. (8pts) Show sample work.
pKa Conjugate base Acid formula Conjugate base name Acid name F3CCOOH 0.20 F3ccoo trifluoroacetic acid trifluoroacetate ion 13.80 Cl3CCOOH 13.34 0.66 Cl3CCOO trichloroacetic acid trichloroacetate ion HOOCCOOH 1.23 HOOCCOO oxalic acid hydrogen oxalate ion 12.77 Cl2HCCOOH 12.70 dichloroacetic acid 1.30 Cl2HCCOO dichloroacetate ion H2SO3 12.23 1.77 HSO3 sulfurous acid hydrogen sulfite ion 1.92SO42- HSO4 hydrogen sulfate ion sulfate ion 12.08 HCIO2 1.95 CI02 chlorous acid chlorite ion 2.12 H2PO.4 phosphoric acid H3PO dihydrogen phosphate ion 11.88 CIH2CCOOH 2.87 CIH2CCOO 11.13...
TABLE 15.5 Acid lonization Constants (K) for Some Monoprotic Weak Acids at 25 °C Acid Formula Structural Formula lonization Reaction К. pk, = -log (2) Chlorous acid HCIO H-0-C=0 1.1 x 10-2 1.96 Stronger acids Nitrous acid HNOZ H-O-NO 5.6 x 10-4 HCIO2(aq) + H2011) = H30* (aq) + CO2 (aq) HNO2(aq) + H20(I) = H30+ (aq) + NO2 (aq) HF(aq) + H20(1) = H30* (aq) + F"(aq) 3.25 Hydrofluoric acid HF H-F 6.3 x 10-4 3.20 O Methanoic acid...
As for the circled answer I'm not sure if that's the correct one so
please explain how we get the answer. Thanks in advance!
Calculate the pH of 0.10M solutions of the following Substances. Based on your calculations, Circle the solution that is the most basic? a) (CoHs NH3) No3 6) Na CC + HBO₂) c) NaNO3 pH- Adid lodic acid Comous acid Cute and Niusad Hydrofluoriid Formic acid Bad Hydraznic acid Acetic acid Hypochlorous acid Hydrocyanic acid но HCO,...
59. Based on the information found in Table 16.2 with respect to K, which statement is true? Page 12 TABLE 16.2 Some Weak Acids in Water at 25°C Structural Conjugate Acid Formula Equilibrium Reaction K Hydrofluoric (HF) HF + HO HO + F 68 x 10-4 Nitrous HO-NO NO, HNO (M) + H200 H304) + NO:) 5 x 10+ CHNO) Benzo GH.0, HCH. + H.-H,0) + CH.063 X 10 CHCH,0) Acetic H-0----HC,H,O, HCH,000+ HODH,00) + CH,0) 18 109 CHCH.O.) Hypochlorus...
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