Identify the unknown weak acid that has a pH of 2.75 in a 0.025 m solution (4 marks)
Identify the unknown weak acid that has a pH of 2.75 in a 0.025 m solution...
A 0.048 M solution of an unknown weak acid, HA, has a pH = 2.75. What is the hydrogen ion concentration of this solution? Answer in scientific notation and be sure to include your units. (Scientific notation: Ex. 2.4 x 103 = 2.4E3) HA(aq) + H+ (aq) + A (aq) Answer: A 0.048 M solution of an unknown weak acid, HA, has a pH = 2.75. What is the value of the acid dissociation constant, K ? Answer in scientific...
A 0.048 M solution of an unknown weak acid, HA, has a pH = 2.75. What is the hydrogen ion concentration of this solution? Answer in scientific notation and be sure to include your units. (Scientific notation: Ex. 2.4 x 103 = 2.4E3) HA(aq) + H+(aq) + A'(aq) Answer: A 0.048 M solution of an unknown weak acid, HA, has a pH = 2.75. What is the value of the acid dissociation constant, Ka? Answer in scientific notation. Answer: A...
1) Determine the pH of a 0.0785 M unknown weak base solution. Kb of the unknown weak base is 4.7 x 10−6. 2) An unknown weak acid solution with a concentration of 0.0850 M has a pH of 4.35. What is the Ka for this weak acid? 3) What is the pH of a 0.0380 M solution of HNO2? (Use your workbook to find Ka) 4) An unknown weak base solution with a concentration of 0.187 M has a pH...
1. What is the pH of a solution which is 0.025 M in weak base and 0.039M in the conjugate weak acid (Ka = 7.1 × 10-6)? 2. A buffer solution is made using a weak acid, HA , that has a pKa of 5 . If the pH of the buffer is 8 , what is the ratio of [A−] to [HA] ? 3.A buffer solution is made using a weak acid, HA . If the pH of the...
3) A 0.80 M solution of an unknown acid, HXog), has a pH of 3.75. a) Calculate the percent reaction. (2 marks) b) Calculate Ka for this acid. (2 marks) c) Based on your calculations in (a) and (b), is HX a strong acid, or a weak acid? Explain your answer. (2 marks)
The pH of a 0.14 M solution of an unknown weak acid is 5.85. Calculate the Ka of the acid.
An unknown weak acid with a concentration of 0.078 M has a pH of 1.80. What is the Ka of the weak acid? O of 1 point earned 2 attempts remaining An unknown weak base with a concentration of 0.170 M has a pH of 9.96. What is the Kb of this base? O of 1 point earned 2 attempts remaining
What is the pH of a 0.0013 M Ca(OH)2 solution? Answer to 2 decimal places. A 0.048 M solution of an unknown weak acid, HA, has a pH = 2.75. What is the hydrogen ion concentration of this solution? Answer in scientific notation and be sure to include your units. (Scientific notation: Ex. 2.4 x 103 = 2.4E3) HA(aq) ↔ H+(aq) + A-(aq) A 0.048 M solution of an unknown weak acid, HA, has a pH = 2.75. What is...
1. Calculate the pH at 25°C of a 0.757 M solution of a weak acid that has Ka = 9.28 x 10 2. Determine the Kb of a weak base if a 2.50 M solution of the base has a pH of 9.595 at 25°C. 3. The overall dissociation of malonic acid, H2C3H2O4, is represented below. The overall dissociation constant is also indicated. H2C3H204 = 2 H+ + C3H2042- K = 3.0 x 10-9 To a 0.025-molar solution of malonic...
1. A 0.100 M solution of a weak acid has a pH of 1.96. Calculate the [H3O+] in the solution. 2. Suppose you have a 0.100 M solution of a weak acid that has a pH of 2.07. Calculate the Ka for this acid. *Report your answer to 2 significant figures.