buffer solutions 1. Determine the volume of 1.0 M tartaric acid, H2CaH&Os, solution that when diluted...
Exam review questions 2) In which aqueous system is PbF2 least soluble? 2) A) 1.0 M HNO3 B) H20 C) 0.5 M HF D) 0.2 MHF E) 0.8 M KF 3) A buffer solution contains 0.100 M fluoride ions and 0.126 M hydrogen fluoride. What is the 3) concentration (M) of hydrogen fluoride after addition of 7.00 mL. of 0.0100 M HCI to 25.0 mL of this C0.123 4) In which of the following aqueous solutions would you expect AgCl...
A buffer contains 0.020 mol of lactic acid (pKa = 3.86) and 0.100 mol sodium lactate per liter of aqueous solution. a. Calculate the pH of this buffer. b. Calculate the pH after 8.0 mL of 1.00 M NaOH is added to 1 liter of the buffer (assume the total volume will be 1008 mL).
A buffer solution is prepared by mixing 1000mL of 2 0M lacthtc acid with 100.0mL of 20M sodium lactate. This butferis then diluted 1-5 by adding 4ooml of the buffer to 160.0mL of delonized water. the buffer to 160.0mb of deionized water Calculate the volume (in mL) of 2.oM HCI required to change pH of 50.0ml. of this diluted buffer by one pH unit. Ka (lactic acid) 1.38x104
Calculate pH of 0.2 M solution of Tartaric acid. Calculate the volume of 1 M solution of NaOH required to neutralize 20 mL of 0.2 M tartaric acid solution (final pH should be 7). (pKa's of Tartaric acid are 3.0 and 4.4). 3.
A buffer contains 0.010 mol of lactic acid (pKa = 3.86) and 0.050 mol of sodium lactate per liter. (a) Calculate the pH of the buffer. (b) Calculate the change in pH when 5.0 mL of 0.50 M HCl is added to 1.0 L of the buffer. (c) What pH change would you expect if you added the same quantity of HCl to 1.0 L of pure water?
Calculate the pH of a buffer solution prepared by mixing 75 mL of 1.0 M lactic acid and 25 mL of a 1.0M sodium lactate. (pka of lactic acid = 3.86) Calculate the change in pH that occurs when 0.01moles of OH are added to a 1L buffered solution that contains 0.5M acetic acid (HC_2H_3O_2) and 0.5M acetate ion (C_2H_3O_2). Acetic acid pka = 4.76.
Consider a buffer solution produced by dissolving 0.260 mol of acetic acid and 0.260 mol of sodium acetate in enough water to make a 500.00 mL solution. What volume in mL of a 0.150 M solution of HCl(aq) would need to be added to this solution to make it completely ineffective as a buffer? Explain.
A buffer is made by adding 0.350 mol lactic acid, CH3CH(OH)COOH, and 0.350 mol potassium lactate, CH3CH(OH)COOK, to enough water to make 1.10 L of solution. The pKa is equal to 4.24. Calculate the pH of this solution after 3.0 mL of 3.0 M KOH is added to the buffer.
(10 pts) A solution is prepared by dissolving 1.239 grams of hydrochloric acid, HCI, in enough water to make 250.0 mL of solution. A 25.00 mL sample of this solution is diluted with water to a final volume of 100.0 mL. Now, you take 10.00 mL of that solution and dilute it to 100.00 mL What is the molarity of the final solution? (HCI 36.45 g/mol)
What volume of 18.0 M sulfuric acid must be diluted to 250.0 mL to afford a 0.55 M solution of sulfuric acid? (A) 3.1 mL (B) 4.5 ml (C) 7.6 mL (D) 31 ml