# A 1.982g sample of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt ( ACES−K+, MW = 220.29 g/mol) is dissolved i...

###### Question:

A 1.982g sample of N-2-acetamido-2-aminoethane-sulfonic acid potassium salt ( ACES−K+, MW = 220.29 g/mol) is dissolved in 87.51 mL of water.To the solution, 21.98 mL of HCl is added, resulting in a pH of 7.27. Calculate the concentration of the HCl solution. The p?a of ACES is 6.85.

I have calculated this several times and have gotten the same answer, 0.112754 M. However, Sapling says that I am wrong. Then Sapling gives these instructions:

To begin, calculate the original number of moles of ACES− in solution. When a strong acid, such as HCl, is added to a weak base, such as ACES−, the HCl will react completely and ACES− will be converted to ACES. The number of moles of H+ added equals the number of moles of ACES− consumed, which is equal to the corresponding increase in the moles of ACES in solution. Write the reaction between ACES− and HCl and set up a table showing the initial and final number of moles of ACES− and ACES in solution after the addition of ? number of moles of HCl. Use the Henderson-Hasselbalch equation to determine the moles of HCl added to the solution.

I have attempted this and still do not have the correct answer. Please and thank you to whoever knows how to do this.

#### Similar Solved Questions

##### Walsh Company manufactures and sells one product. The following information pertains to each of the company's...
Walsh Company manufactures and sells one product. The following information pertains to each of the company's first two years of operations: 29 15 Variable costs per unit: Manufacturing: Direct materials Direct labor Variable manufacturing overhead Variable selling and administrative Fixed costs...
##### What is the standard form of  y=(3x – 4) (2x – 1) (x – 2) ?
What is the standard form of  y=(3x – 4) (2x – 1) (x – 2) ?...
##### A static budget is one that is geared to the most profitable level of activity for...
A static budget is one that is geared to the most profitable level of activity for a company. O is a projection of budget data at various levels of activity. O considers that actual activity is often different from the level of activity expected. is a projection of budget data at one level of activi...
##### How to do this drawing with loft command using autocad solid model Draw as a loft...
how to do this drawing with loft command using autocad solid model Draw as a loft the C Clamp shown. Use the shapes (A,B,C,and D) as the cross sections and the polyline (in color) as the guide curve. Add al unit cylinders to the ends. Make one cylinder.125H (Height) and the other 1.125H (Height...
##### The entrance door to a video store is pivoted about the hinges on the left side...
The entrance door to a video store is pivoted about the hinges on the left side of the door. When you begin to push on the right side of the door to enter the store, what is the direction of the torque on the door? O clockwise out of the store O counterclockwise O upward O into the store...
##### At what value should the following be recorded? Acquisition of a plant asset for cash. Acquisition...
At what value should the following be recorded? Acquisition of a plant asset for cash. Acquisition of a plant asset in exchange for stock. Exchanging plant asset(s) for other plant asset(s). Donation of a plant asset....
##### 49. A nurse is caring for a client who has bipolar disorder. Which of the following...
49. A nurse is caring for a client who has bipolar disorder. Which of the following client findings is an indication that the client is about to experience a manic phase? a. The client is restless and has changes in his sleep pattern b. The client laughs out loud and is overly cheerful C. The client...
##### A scuba diver releases a balloon containing 181.8 L of helium attached to a tray of...
A scuba diver releases a balloon containing 181.8 L of helium attached to a tray of artifacts at an underwater archeological site. When the balloon reaches the surface it has expanded to 478.5 L. The pressure at the surface is 1.098 atm. Pressure increases by 1.0 atm for every 10 m of depth. At what...
##### Nitric oxide is formed in automobile exhaust when nitrogen and oxygen in air react at high temperatures. 29. N2(g)+O...
Nitric oxide is formed in automobile exhaust when nitrogen and oxygen in air react at high temperatures. 29. N2(g)+O:(g) 2NO(g) The equilibrium constant Kp for the reaction is 0.0025 at 2127 C. If a container is charged with 8.00 atm of nitrogen and 5.00 atm of oxygen and the mixture is allowed to r...
##### Two round pipes have water flowing through them. Pipe B is half of the diameter of...
Two round pipes have water flowing through them. Pipe B is half of the diameter of pipe A. If the average velocity of the flow through both pipes is the same, what is QA/QB? 7. Two round pipes have water flowing through them. Pipe B is half of the diameter of pipe A. If the average velocity of the ...
##### Rose bought green mangoes at P50.00 a kilo and sold them at 4 for P35.00
Rose bought green mangoes at P50.00 a kilo and sold them at 4 for P35.00. If she sold 20 kilos and there is an average of 7 mangoes per kilo, how much did she earn?...
##### How do you write a rule for the nth term of the arithmetic sequence a_11=29, a_20=101?
How do you write a rule for the nth term of the arithmetic sequence a_11=29, a_20=101?...