1 answer

Calculate the pH of the solution that results from each of the following mixtures. 55.0 mL...

Question:

Calculate the pH of the solution that results from

Calculate the pH of the solution that results from each of the following mixtures. 55.0 mL of 0.15 M HCHO_2 with 70.0 mL of 0.13 M NaCHO_2 120.0 mL of 0.13 M NH_3 with 260.0 mL of 0.13 M NH_4C1

Answers

a)

this is abuffer so

pH = pKa + log(NaCHO2/HCHO2)

NaCHO2 = MV = 55*0.15 = 8.25

HCHO2 = MV = 70*0.13 = 9.1

pH = 3.75 + log(8.25/9.1) = 3.707

B)

pOH = pKB + log(NH4/NH3)

NH4= MV = 0.13*120 = 15.6

NH3 = MV = 0.13*260 = 33.8

pOH = 4.75 + log(15.6/33.8 )=5.9431

pH = 14-5.9431

pH = 8.0569

.

Similar Solved Questions

1 answer
Identify, and summarize a specific Chapter 7 bankruptcy case or issue. Incorporate the legal terminology from...
Identify, and summarize a specific Chapter 7 bankruptcy case or issue. Incorporate the legal terminology from your textbook where appropriate, in both your original post and in your responses to your classmates. Use academic or legitimate news sources, such as The New York Times, the&nbs...
1 answer
The electric field has a constant value of 4.1 x 104 V/m and is directed downward....
The electric field has a constant value of 4.1 x 104 V/m and is directed downward. The field is the same everywhere. The potential at a point P within this region is 169 V. Find the potential at the following points: (a) 9.4 x 10-3 m directly above P, (b) 3.8 x 10-3 m directly below P, (c) 6.2 x 10-...
1 answer
"I know headquarters wants us to add on that new product line," said Dell Havasi, manager...
"I know headquarters wants us to add on that new product line," said Dell Havasi, manager of Billings Company's office products division. "But I want to see the numbers before I make any move. Our division has led the company for three years, and I don't want any letdown." Bi...
1 answer
I was given this spreadsheet and told to create a statement of cash flows. I have...
I was given this spreadsheet and told to create a statement of cash flows. I have been able to figure out the straight forward pieces but am hung up on the PPE and APIC. Please help someone!!!! I tried to do this by myself for as long as I could! I can work backwards to understand how this works. ...
1 answer
Compare and contrast risk factors, the age of onset, pathophysiology and clinical manifestations of Type 1...
Compare and contrast risk factors, the age of onset, pathophysiology and clinical manifestations of Type 1 and Type 2 Diabetes. What do you think is the most important topic that must be taught to the diabetic patient and why?...
1 answer
We were unable to transcribe this imageWe were unable to transcribe this imageNOSKER COMPANY Statement of...
We were unable to transcribe this imageWe were unable to transcribe this imageNOSKER COMPANY Statement of Cash Flows cash payments We were unable to transcribe this image...
1 answer
What is organizational identity? How does it impact an organization's culture?
What is organizational identity? How does it impact an organization's culture?...
1 answer
The bank statement for the checking account of Management Systems Inc. (MSI) showed a December 31,...
The bank statement for the checking account of Management Systems Inc. (MSI) showed a December 31, 2021, balance of $15,033.12. Information that might be useful in preparing a bank reconciliation is as follows: a. Outstanding checks were $1,360.85. b. The December 31, 2021, cash receipts of $595 wer...
1 answer
1. Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to...
1. Hydrogen gas, H2, reacts with nitrogen gas, N2, to form ammonia gas, NH3, according to the equation: 3 H2(g) + N2(g) → 2 NH3(2) - How many grams of H2 are needed to produce 14.43 g of NH3? 2. When propane (C2H8) burns, it reacts with oxygen gas to produce carbon dioxide and water. The unbala...
1 answer
20. Which one of the following reactions is spontaneous (in the direction given) under standard e...
Please answer the following questions! 20. Which one of the following reactions is spontaneous (in the direction given) under standard electrochemical conditions? +2Br- Mg+ Br2 What is the cell potential for a cell constructed by immersing a strip of manganese in a 1. M MnSO4 solution and a strip...
1 answer
The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the...
The effectiveness of a blood-pressure drug is being investigated. An experimenter finds that, on average, the reduction in systolic blood pressure is 39.1 for a sample of size 22 and standard deviation 19.1. Estimate how much the drug will lower a typical patient's systolic blood pressure (using...
1 answer
O GASES Calculating mole fraction in a gas mixture A 8.00 L tank at 19.8 °C...
O GASES Calculating mole fraction in a gas mixture A 8.00 L tank at 19.8 °C is filled with 11.0 g of chlorine pentafluoride gas and 7.97 g of boron trifluoride gas. You can assume both gases behave as ideal gases under these conditions. Calculate the mole fraction of each gas. Be sure each of yo...
1 answer
NEED AN EXPLAINATION ON HOW TO SOLVE, THANK YOU! Diego Company manufactures one product that is...
NEED AN EXPLAINATION ON HOW TO SOLVE, THANK YOU! Diego Company manufactures one product that is Sola Tor $80 per unit In two geographic regions—the East and West regions. The following information pertains to the company's first year of operations in which it produced 40,000 units and sold...
1 answer
Check my work Required information Tableau DA 4-3: Mini-Case, Computing and assigning costs using ABC LO...
Check my work Required information Tableau DA 4-3: Mini-Case, Computing and assigning costs using ABC LO P3 Chrom Co. manufactures two models, the XL and RD. It also has two departments, assembly and finishing. The company wants to assign overhead costs to its two different models to better understa...
1 answer
An important application of regression analysis in accounting is in the estimation of cost. By collecting...
An important application of regression analysis in accounting is in the estimation of cost. By collecting data on volume and cost and using the least squares method to develop an estimated regression equation relating volume and cost, an accountant can estimate the cost associated with a particular ...
1 answer
Help me with these two questions !! I would love an explanation as well In the...
Help me with these two questions !! I would love an explanation as well In the country of Economica, the total labor force consists of 5,000 workers. 200 of these workers are unemployed, and thus the current unemployment rate is 4.0%. This year, 100 workers will lose their jobs, 85 workers will retu...
1 answer
The XYZ Company loaned some money to one of its vendors so the vendor could upgrade...
The XYZ Company loaned some money to one of its vendors so the vendor could upgrade its supply chain. In return, the vendor has agreed to pay XYZ $59,726 a year, with the first payment occurring at the end of year 6.The vendor will make a total of 12 payments to XYZ (one per year). What is the annua...
1 answer
Manufacturing cost data for Vaughn Company, which uses a job order cost system, are presented below....
Manufacturing cost data for Vaughn Company, which uses a job order cost system, are presented below. Indicate the missing amount for each letter. Assume that in all cases manufacturing overhead is applied on the basis of direct labor cost and the rate is the same. (Round overhead rate to 2 decimal p...
1 answer
Help! My Notes O Ask Yeur The temperature of a person with an extremely high fever...
Help! My Notes O Ask Yeur The temperature of a person with an extremely high fever can be lowered with a kcal/mol sponge bath of oopropyl alcohol (CMOH). Th. heat of vaporization of this alcohol is 111 (a) How many kilocalorisa and kilojoules of heat are removed from a périson's skin w...