Why is the following true? Thank you
Homework Answers
The conjugate acid of weak base NH4OH is NH4+ (strong)
The conjugate base of weak acid C2H2O4 is C2O42- (strong)
. Since both NH4+ and C2O42- are strong they undergo hydrolysis according to the following equation,
NH4+ + H2O <-----------> NH4OH(aq) + H+(aq)
C2O42-(aq) + 2H2O <----------> H2C2O4(aq) + 2OH-(aq)
pH of (NH4)2C2O4 = 7+1/2[pKa-pKb)
= 7+ 1/2(-log(5.6*10^-2)+log(1.8*10^-5)
= 5.25
Therefore, the nature of the solution of ammonium oxalate is acidic because pH = 5.25 < 7
---The conjugate acid of weak base NH4OH is NH4+
(strong)
The conjugate base of weak acid HCN is CN- (strong)
. Since both NH4+ and CN- are strong they undergo hydrolysis according to the following equation,
NH4+ + H2O <-----------> NH4OH(aq) + H+(aq)
CN-(aq) + H2O <----------> HCN(aq) + OH-(aq)
pH of NH4CN = 7+1/2[pKa-pKb)
= 7+ 1/2(-log(6.2*10^-10)+log(1.8*10^-5)
= 9.23
Therefore, the nature of the solution of ammonium cyanide is acidic because pH = 9.23 > 7
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Why is the following true? Thank you Considering Kaſhydrogen cyanide) = 6.2x10-10, Kaloxalic acid) = 5.6x10-2,...
***A 50 mL solution of 0.10 M HC2H2O2 (aq) (K = 1.8 x 10-5) is titrated...
***A 50 mL solution of 0.10 M HC2H2O2 (aq) (K = 1.8 x 10-5) is titrated with 0.20 M NaOH (aq). " At the equivalence point is the solution acidic, basic, or neutral and why? o Basic because of excess OH O Basic because of hydrolysis of C2H302 o Neutral salt of strong acid and strong base O Basic because of hydrolysis of HC2H2O2 Acidic because of hydrolysis of Nat
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In a solution buffered to pH 3.443 that contains benzoic acid, propanoic acid, formic acid, and hydrazoic acid, wh...
In a solution buffered to pH 3.443 that contains benzoic acid, propanoic acid, formic acid, and hydrazoic acid, what percent of hydrazoic acid is protonated? Use the acid dissociation constants (K) in this table to answer the question. percentage protonated: Acids Acid Formula Tonization Constant 1.8x10-5 CH3COOH HAO 5.5x10-3 Benzoic Boric Butanoic CHECOOH 6.3x10-5 MyB03 5.4x10-10 C3H2COOH 1.5x10-5 H2CO3 Kat 4.510-7 4.7 10-11 Carbonic Bases Base Formula Ionization Constant ko Ammonia NH3 1.8x10-5 Methylamine CH NH? S.0x10-4 Dimethylamine (CH3)NH 5.4x10-4...
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH of a buffer composed of H2PO4...
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH of a buffer composed of H2PO4 (aq) and HPO (aq), which pKa value would you use in the Henderson-Hasselbalch equation? O pK 1 = 2.16 O p 2=7.21 O pKa3 12.32 Calculate the pH of a buffer solution obtained by dissolving 11.0 g of KH2PO4(s) and 26.0 g of Na2HPO4(s) in water and then diluting to 1.00 L Number pH= |
Phosphoric acid is...
If you need anymore values let me know! Thanks so much for your help! Use the...
If you need anymore values let me know! Thanks so much for your
help!
Use the References to access important values if needed for this question. How many grams of solid ammonium bromide should be added to 1.50 L of a 0.166 M ammonia solution to prepare a buffer with a pH of 8.560 ? grams ammonium bromide Use the References to access important values if needed for this question. How many grams of solid potassium cyanide should be added...
Regarding the following salts: NaCN, KNO3, NH4Cl, NaHCO3, Na3PO4, please review the hydrolysis net ionic equations...
Regarding the following salts: NaCN, KNO3, NH4Cl, NaHCO3, Na3PO4, please review the hydrolysis net ionic equations below and provide specific information in sentences regarding why the following salts were classified as acids/bases/neutral -why the salt was classified the way it was (acidic/basic/neutral) -which ions are reacting in each salt/equation and are the ions behaving as an acid or a base -why is the ion behaving that way -and why other ions may not be reactive pls answer all qs for...
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH...
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I didn't know which one so I posted all of what I was provided Acid/Base Ionization...
I didn't know which one so I
posted all of what I was provided
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***A 50 mL solution of 0.10 M HC2H2O2 (aq) (K = 1.8 x 10-5) is titrated with 0.20 M NaOH (aq). " At the equivalence point is the solution acidic, basic, or neutral and why? o Basic because of excess OH O Basic because of hydrolysis of C2H302 o Neutral salt of strong acid and strong base O Basic because of hydrolysis of HC2H2O2 Acidic because of hydrolysis of Nat
4. The following is a synthetic amino acid. Would you expect it to be acidic, basic, or neutral when dissolved in water? Explain your reasoning. H2N* *NH3 Coo 5. The following is a synthetic amino acid. Would you expect it to be acidic, basic, or neutral when dissolved in water? Explain your reasoning. *NH3 Coo
Part 1: Buffers Considering the acetic acid sodium acetate buffer, complete the table below NaOH added/mL. measured pH 0.0 20 Did the pH change a little or a lot when NaOH was added to the butter? Was the change you observed consistent with the action of a butter? For the ammonium chloride-ammonia buffer give the measured pH for the 50.0 mL of 0.10 Mammonia. Is this solution acidic, neutral, or basic? Did the pH of the ammonia increase or decrease...
In a solution buffered to pH 3.443 that contains benzoic acid, propanoic acid, formic acid, and hydrazoic acid, what percent of hydrazoic acid is protonated? Use the acid dissociation constants (K) in this table to answer the question. percentage protonated: Acids Acid Formula Tonization Constant 1.8x10-5 CH3COOH HAO 5.5x10-3 Benzoic Boric Butanoic CHECOOH 6.3x10-5 MyB03 5.4x10-10 C3H2COOH 1.5x10-5 H2CO3 Kat 4.510-7 4.7 10-11 Carbonic Bases Base Formula Ionization Constant ko Ammonia NH3 1.8x10-5 Methylamine CH NH? S.0x10-4 Dimethylamine (CH3)NH 5.4x10-4...
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH of a buffer composed of H2PO4 (aq) and HPO (aq), which pKa value would you use in the Henderson-Hasselbalch equation? O pK 1 = 2.16 O p 2=7.21 O pKa3 12.32 Calculate the pH of a buffer solution obtained by dissolving 11.0 g of KH2PO4(s) and 26.0 g of Na2HPO4(s) in water and then diluting to 1.00 L Number pH= |
Phosphoric acid is...
If you need anymore values let me know! Thanks so much for your
help!
Use the References to access important values if needed for this question. How many grams of solid ammonium bromide should be added to 1.50 L of a 0.166 M ammonia solution to prepare a buffer with a pH of 8.560 ? grams ammonium bromide Use the References to access important values if needed for this question. How many grams of solid potassium cyanide should be added...
Phosphoric acid is a triproccd (K 6.9x10-3, 6.2x10-8, and Ka3 4.8x 10-13). To find the pH of a buffer composed of H2PO4 (aq) and HPO (aq), which pKa value would you use in the Henderson-Hasselbalch equation? O pK 1 = 2.16 O p 2=7.21 O pKa3 12.32 Calculate the pH of a buffer solution obtained by dissolving 11.0 g of KH2PO4(s) and 26.0 g of Na2HPO4(s) in water and then diluting to 1.00 L Number pH= |
I didn't know which one so I
posted all of what I was provided
Acid/Base Ionization Constants at 25 °C Acid Formula Kal Ka2 Каз Acetic acid CH3COOH 1.8x10-5 Acetylsalicylic acid (aspirin) HC,H-04 3.0x10-4 Aluminum ion Al(H20)43+ 1.2x10-5 Arsenic acid H3 AsO4 2.5x10-4 5.6x10-8 3.0x10-13 Ascorbic acid H2C6H606 7.9x10-5 1.6x10-12 Benzoic acid CH3COOH 6.3x10-5 Carbonic acid H2CO3 4.2x10-7 4.8x10-11 Ferric ion Fe(H20)63+ 4.0*10-3 Formic acid HCOOH 1.8x104 Hydrocyanic acid HCN 4.0*10-10 Hydrofluoric acid HF 7.2x104 Hydrogen peroxide H202 2.4x10-12 Hydrosulfuric...
Question 8 3 pts Which of the following is not a conjugate acid/base pair? O HC2H302/C2H302" O NH4+/NH3 CO2/C03 OH3PO4/H2PO4 Question 9 3 pts A 1.0 M solution of NaC2H3O2 in water is expected to be: Acidic because sodium acetate undergoes hydrolysis Neutral because sodium acetate is a salt Basic because acetate ion is the conjugate base of acetic acid Acidic because it forms acetic acid Question 10 3 pts Examples of ionizing radiation would include: infrared (IR) visible light...
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