Question

In: Chemistry

500ml of an HTS/TS- buffer (pKa = 5.25) at pH 4 was prepared. Unfortunately, the student...

500ml of an HTS/TS- buffer (pKa = 5.25) at pH 4 was prepared. Unfortunately, the student who had prepared the buffer forgot how many moles of HTS and TS- he had added. Although HTS does not fluoresce, TS- does fluoresce. (If = 1000CTS). The intensity of the fluorescence signal from the buffer is 10. How many moles of HTS and TS- were used to prepare 500ml of the pH 4 buffer?

Solutions

Expert Solution


Related Solutions

A pH 3.30 buffer is prepared from iodoacetic acid ICH2COOH (pKa = 3.175), and sodium iodoacetate,...
A pH 3.30 buffer is prepared from iodoacetic acid ICH2COOH (pKa = 3.175), and sodium iodoacetate, ICH2COO-Na+ . If ionic strength of the buffer solution must not exceed 0.200 M, what are the maximum concentrations of the two components that could be used? What volume of KOH (conc = 1.850 M), could be added to 50.00 mL of the buffer solution of part (a), before the pH would increase to 4.000?
Make a buffer with this solution: 0.1M NaCl, 0.5M Tris, 0.02% NaN3, pH 7.5, 500ml buffer...
Make a buffer with this solution: 0.1M NaCl, 0.5M Tris, 0.02% NaN3, pH 7.5, 500ml buffer please provide detailed steps and explanations, thx
(4). Chapter 14 Calculate the pH of the buffer prepared by mixing (a)  2.0 g of NaOH...
(4). Chapter 14 Calculate the pH of the buffer prepared by mixing (a)  2.0 g of NaOH with 12 g of NH4Cl and diluting to 500 ml with wate (b) 5.0 ml of 6.0 M HCl with 5.0 g of sodium acetate and diluting to 500 ml with water
Part 1: You wish to create a buffer with the pH equal to the pKa. If...
Part 1: You wish to create a buffer with the pH equal to the pKa. If the following combinations were dissolved in 1.0 L of water, which combination(s) would accomplish that goal? 1) 1.0 mole of HF and 1.0 mol of NaF 2) 1.0 mole of HF and 1.0 mol of NaOH 3) 1.0 mole of NaF and 1.0 mol of HCl 4) 1.0 mole HF and 0.5 mol NaOH A 1, 2, 3, and 4 B 1 only C...
1. Calculate the pH of the buffer of a solution of 0.02M acetic acid (pKa =...
1. Calculate the pH of the buffer of a solution of 0.02M acetic acid (pKa = 4.76) and 0.04 M acetate 2. Based on your answer to the previous question, how much of a 0.5 M solution of HCl must be added to 200 mL of the above mentioned solution to lower the pH to 2.50? Ignore volume changes.
You prepare a 0.200M solution of a monoprotic buffer at pH 7.22. The pKa of this...
You prepare a 0.200M solution of a monoprotic buffer at pH 7.22. The pKa of this buffer is 7.53 at room temperature. a. What is the molarity of the acid and conjugate base necessary to make the buffer. [HA]=? [A-]=? b. A separate 1.0 M stock solution of the acid and conjugate base is made/ How many mL of each will you use to prepare 1.0 L of the buffer in part a? mL of HA=? mL of A-=? c....
1) jake wants to make a pH 5.5 pyridine buffer by adding concentrated HCl to 500ml...
1) jake wants to make a pH 5.5 pyridine buffer by adding concentrated HCl to 500ml of a 0.05M pyridine solution. if the Ka is 1.26*10^-5, how many ml of 0.5M HCl should be added? 2) Describe the preparation of 2.0 liters of 0.4M HCl by measuring out a calculated volume. You begin with a 28% w/w solution of HCl (FW=36.5) that is 1.15 g/ml
a) You have to prepare a pH 5.25 buffer from the following 0.100 M solutions available:...
a) You have to prepare a pH 5.25 buffer from the following 0.100 M solutions available: 1. hydrocyanic acid 2. hypobromous acid 3. propanoic acid 4. potassium cyanide 5. potassium hypobromite 6. potassium propanoate Which solutions would you choose to make the most effective buffer? Why? b) How many milliliters of each of each o the solutions selected in part a would you use to make one liter of the final buffer solution?
You have 100ml of 1.0M PIPES buffer at the pH = 5.76. The pKa for PIPES...
You have 100ml of 1.0M PIPES buffer at the pH = 5.76. The pKa for PIPES is 6.76. How much 10 M NaOH would you need to add to change the pH from 5.76 to 6.76? Do not concern yourself with dilution effects. a. 2.0 ml b. 4.0 ml c. 8.0 ml d. 9.8 ml The answer is B I am just unsure how to arrive there.
Describe the preparation of 1L of a 0.1 M phosphate buffer at pH 8.0. The pKa...
Describe the preparation of 1L of a 0.1 M phosphate buffer at pH 8.0. The pKa for the buffer is 6.86
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT