Homework Answers
The moles of the reagents are calculated:
n KOH = M * V = 2,657 M * 0.3678 L = 0.9772 mol
n AA = 1.77 M * 0.231 L = 0.4089 mol
The ratio mol OH- / mol AA is calculated:
Ratio = 0.9772 / 0.4089 = 2.39
Since it is greater than 2, the KOH neutralizes all the Acid (both protons), the remaining OH-moles and their concentration are calculated:
n OH-rem = 0.9772 - (2 * 0.4089) = 0.1594 mol
[OH-] = n / V = 0.1594 / 0.5988 = 0.2662 M
POH and pH are calculated:
pOH = - log 0.2662 = 0.57
pH = 14 - 0.57 = 13.43
If you liked the answer, please rate it in a positive way, you would help me a lot, thank you.
Add Answer to:
please help with this one
What will the pH of a solution be when 0.3678 L...
What will the pH of a solution be when 0.3108 L of 2.703 M KOH is...
What will the pH of a solution be when 0.3108 L of 2.703 M KOH is added to 0.187 L of 2.07 M ascorbic acid (H2C6H606)? Enter your answer to 4 significant figures. (click here to open a table of K, and kb values in a new window) pH of solution = 13.89 Submit Answer Incorrect. Tries 1/2 Previous Tries
What is the pH of a solution that consists of 0.50 M H2C6H6O6 (ascorbic acid) and...
What is the pH of a solution that consists of 0.50 M H2C6H6O6 (ascorbic acid) and 0.75 M NaHC6H6O6 (sodium ascorbate)? What is the pH if 20.0 mL of a 0.280 M perchloric acid is added to 200.mL of the ascorbic acid sodium ascorbate solution? What is the pH if 30.0 mL of a 0.125 M sodium hydroxide is added to 200.mL of the ascorbic acid sodium ascorbate solution? The ionization constant for ascorbic acid is 6.8 x 10–5
Determine the pH change when 0.049 mol HCl is added to 1.00 L of a buffer...
Determine the pH change when 0.049 mol HCl is added to 1.00 L of a buffer solution that is 0.332 M in HF and 0.231 M in F". pH after addition - pH before addition = pH change = Submit Answer Retry Entire Group 9 more group attempts remaining A buffer solution contains 0.433 MCH3NH2Cl and 0.362 M CH3NH, (aniline). Determine the pH change when 0.096 mol KOH is added to 1.00 L of the buffer. pH after addition -...
1.0 L of a 1.2 M solution of formic acid (Ka=1.8x10-4) was prepared. What is the...
1.0 L of a 1.2 M solution of formic acid (Ka=1.8x10-4) was prepared. What is the pH of this solution? 1.8328 You are correct. Your receipt no. is 162-1608 Previous Tries Enough potassium formate was added to achieve a final potassium formate concentration of 1.7 M (assume the volume does not change). What is the pH of this new solution? 3.8960 You are correct. ceipt no. is 162-6598 Previous Tries 10 mL of 10 M NaOH is added to the...
Need work step by step please! pH of a Buffered Solution Using tabulated Ka and Kp...
Need work step by step please!
pH of a Buffered Solution Using tabulated Ka and Kp values, calculate the pH of the following solutions. Answer to 2 decimal places. K2 & Kb values may be found in Zumdahl, Chemical Principles 8th ed. Appendix 5 Tables A5.1, A5.3. A solution containing 1.5x10-1 M HOCI and 4.4x 10-1 M NaOCI 1pts Incorrect. Tries 2/5 Previous Tries Submit Answer 1000.0 mL of solution containing 11.0 g of CH3COOH and 20.0 g of CH...
help with this question Consider a 0.211 L solution of the amino acid aspartic acid (0.631...
help with this question
Consider a 0.211 L solution of the amino acid aspartic acid (0.631 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.25 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer...
41.645 -113,30 Calculate the pH of a solution of 0.1M pyridine solution (CHN) with a k)...
41.645 -113,30 Calculate the pH of a solution of 0.1M pyridine solution (CHN) with a k) = 1.7 x 10-9 W Colts N 1₂O ² ColH₂NH TOH eek Lase I o.l k, CH, NAD LOH-] [Estoni C -x E .1-x x =LOH 1.7.10-9 = 0.10-0 If the base H, NON has a ky 4.4 X 10", what is the pH of a 0.05M solution of H, NOH? It is known that the K, for ammonia is 1.8 x 10-5 and...
Calculate the pH of a 0.05 M solution of ascorbic acid ( H2C6H6O6 = H2ASC) Ka1...
Calculate the pH of a 0.05 M solution of ascorbic acid ( H2C6H6O6 = H2ASC) Ka1 = 1 x 10-5 Ka2= 5 x 10-12 H2ASC (aq) + H2O (l) <=> H3O+ (aq) + HASC- (aq)
Consider 1.0 L of a solution which is 0.45 M HF and 0.2 M NaF (Ka...
Consider 1.0 L of a solution which is 0.45 M HF and 0.2 M NaF (Ka for HF = 7.2 x 10-4). Assume 2 significant figures in all of the given concentrations so that you should calculate all of the following pH values to two decimal places. Calculate the pH after 0.10 mol of HCl has been added to the original solution. Assume no volume change on addition of HCl. Why do we need to convert to Kb? I know...
Part A A 0.25 M solution of a salt NaA has pH = 9.49. What is...
Part A A 0.25 M solution of a salt NaA has pH = 9.49. What is the value of Ka for the parent acid HA? Express your answer using two significant figures. AD Ka Ка- Request Answer Submit
What will the pH of a solution be when 0.3108 L of 2.703 M KOH is added to 0.187 L of 2.07 M ascorbic acid (H2C6H606)? Enter your answer to 4 significant figures. (click here to open a table of K, and kb values in a new window) pH of solution = 13.89 Submit Answer Incorrect. Tries 1/2 Previous Tries
Determine the pH change when 0.049 mol HCl is added to 1.00 L of a buffer solution that is 0.332 M in HF and 0.231 M in F". pH after addition - pH before addition = pH change = Submit Answer Retry Entire Group 9 more group attempts remaining A buffer solution contains 0.433 MCH3NH2Cl and 0.362 M CH3NH, (aniline). Determine the pH change when 0.096 mol KOH is added to 1.00 L of the buffer. pH after addition -...
1.0 L of a 1.2 M solution of formic acid (Ka=1.8x10-4) was prepared. What is the pH of this solution? 1.8328 You are correct. Your receipt no. is 162-1608 Previous Tries Enough potassium formate was added to achieve a final potassium formate concentration of 1.7 M (assume the volume does not change). What is the pH of this new solution? 3.8960 You are correct. ceipt no. is 162-6598 Previous Tries 10 mL of 10 M NaOH is added to the...
Need work step by step please!
pH of a Buffered Solution Using tabulated Ka and Kp values, calculate the pH of the following solutions. Answer to 2 decimal places. K2 & Kb values may be found in Zumdahl, Chemical Principles 8th ed. Appendix 5 Tables A5.1, A5.3. A solution containing 1.5x10-1 M HOCI and 4.4x 10-1 M NaOCI 1pts Incorrect. Tries 2/5 Previous Tries Submit Answer 1000.0 mL of solution containing 11.0 g of CH3COOH and 20.0 g of CH...
help with this question
Consider a 0.211 L solution of the amino acid aspartic acid (0.631 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.25 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer...
41.645 -113,30 Calculate the pH of a solution of 0.1M pyridine solution (CHN) with a k) = 1.7 x 10-9 W Colts N 1₂O ² ColH₂NH TOH eek Lase I o.l k, CH, NAD LOH-] [Estoni C -x E .1-x x =LOH 1.7.10-9 = 0.10-0 If the base H, NON has a ky 4.4 X 10", what is the pH of a 0.05M solution of H, NOH? It is known that the K, for ammonia is 1.8 x 10-5 and...
Part A A 0.25 M solution of a salt NaA has pH = 9.49. What is the value of Ka for the parent acid HA? Express your answer using two significant figures. AD Ka Ка- Request Answer Submit
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago