Calculate the pH of a buffered solution that is 0.35 M H2PO4- and 0.75 M HPO42-....

Question

Question

Calculate the pH of a buffered solution that is 0.35 M H2PO4- and 0.75 M HPO42-. The Ka = 6.2 x 10-8.

science chemistry

Answer 1

Answer #1

If you have any questions please comment

If you satisfied with the solution please rate it thanks...

Answer 2

Similar Homework Help Questions

Calculate the pH and the equilibrium concentrations of H2PO4-, HPO42- and PO43- in a 0.0287 M...

Calculate the pH and the equilibrium concentrations of H2PO4-, HPO42- and PO43- in a 0.0287 M aqueous phosphoric acid solution. For H3PO4, Ka1 = 7.5×10-3, Ka2 = 6.2×10-8, and Ka3 = 3.6×10-13 pH = [H2PO4-] = [HPO42-] = [PO43-] =
Calculate the ratio of the molar concentrations of HPO42- and H2PO4- ions required to obtain a...

Calculate the ratio of the molar concentrations of HPO42- and H2PO4- ions required to obtain a buffer solution at pH = 7.0. For phosphoric acid, Ka1 = 7.5 × 10-3 Ka2 = 6.2 × 10-8 Ka3 = 4.2 × 10-13
A buffer is to be made up with a mixture of H2PO4- and HPO42-, how many...

A buffer is to be made up with a mixture of H2PO4- and HPO42-, how many grams of HPO42- is needed for a buffer of pH=7.5 if the solution contains .0015 mol of H2PO4- Ka of H2PO4- is 6.2x10-8

Calculate the following: a. The pH of a 500.0 mL buffer solution containing 0.75 M HCN...

Calculate the following: a. The pH of a 500.0 mL buffer solution containing 0.75 M HCN (Ka = 6.2 x 10^-10) and 0.55 M NaCN b. The pH of the above buffer after the addition of 100.0 mL of 1.0 M NaOH. c. The pH of the buffer if 100.0 mL of 1.0 M HCl was added to the solution in part a.
6. What is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give...

6. What is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 and 20.41 g of K2HPO4 in water to give a volume of 200.0 mL? The Ka2 for dihydrogen phosphate is 6.2 x 10-8 and the equilibrium reaction of interest is H2PO4 (4) + H20 <-> H30* ( HPO4 (4) 7. Determine the pH of a 0.188 M NH3 solution at 25°C. The Kh of NH3 is 1.76 x 10-5. 8. Calculate the pH of...
Acid Acid Dissociation Constant, Ka H3PO4 7 x 10-3 H2PO4- 8 x 10-8 HPO42- 5 x...

Acid Acid Dissociation Constant, Ka H3PO4 7 x 10-3 H2PO4- 8 x 10-8 HPO42- 5 x 10-13 On the basis of the information above, a buffer with a pH = 9 can best be made by using A. H3PO4 + H2PO4- B. H2PO4- + PO43- C. H2PO4- + HPO42- D. HPO42- + PO43-

1. A buffer is prepared using 0.20 mol of H2PO4 and 0.10 mol of HPO42 in 500 mL of solution. Will...

1. A buffer is prepared using 0.20 mol of H2PO4 and 0.10 mol of HPO42 in 500 mL of solution. Will the buffer capacity be exceeded if 5.6 g of KOH is added to it? What is the pH of the original solution and the pH of the new solution? (Kb 1.6 x 10-7) 2. How many milliliters of 0.113M HBr should be added to 52.2 ml of 0.0134 M morpholine to give a pH of 8? (The pKa of...
Q: What is the pH of a solution containing 0.125 M KH2PO4 and 0.175 K2HPO4 Ka...

Q: What is the pH of a solution containing 0.125 M KH2PO4 and 0.175 K2HPO4 Ka (H2PO4-) = 6.2 x 10-8 Ka (HPO42-) = 4.8 x 10-13 Q: A 0.15 M solution of a weak acid is 3.0 % dissociated. What is the Ka of this acid? Q: A solution of aspirin was prepared that is 0.16 M. The pH of this solution was measured to be 2.43. What is the Ka of aspirin? Q: A solution of formic acid...
A buffer solution is 0.451 M in KH2PO4 and 0.335 M in K2HPO4. If Ka for...

A buffer solution is 0.451 M in KH2PO4 and 0.335 M in K2HPO4. If Ka for H2PO4- is 6.2 x 10^-8 , what is the pH of this buffer solution? A buffer solution is 0.451 M in KH P04 and 0.335 M in K2HPO4. If Ką for H2PO4 is 6.2 x 10-8, what is the pH of this buffer solution? pH =

The pH of blood is 7.40. What is the ratio of [HPO42-]/H2PO4-] in the blood (assume...

The pH of blood is 7.40. What is the ratio of [HPO42-]/H2PO4-] in the blood (assume 25oC). Phosphoric Acid Ka1 = 1.1 X 10-2, Ka2 = 7.5 X 10-8, Ka3 = 4.8 X 10-13