Calculate the (H+] when 0.500 mmol HCl is added to 100.00 mL of 0.0200 M lactic acid and 0.0300 Madiun lactate pluti...
A buffer made with 100.00 mL of 0.95 M lactic acid (Ka=1.4x10-4) and 200.00 mL of 0.50 M lactate has a final volume of 1.0 L. What is the pH of this buffer?
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).
1) Calculate the pH of the 1L buffer composed of 500 mL of 0.60 M acetic acid plus 500 mL of 0.60 M sodium acetate, after 0.010 mol of HCl is added (Ka HC2H3O2 = 1.75 x 10-5). Report your answer to the hundredths place. 2) Calculate the pH of the 1L buffer composed of 500 mL 0.60 M acetic acid plus 500 mL of 0.60 M sodium acetate, after 0.010 mol of NaOH is added (Ka HC2H3O2 = 1.75...
A 100.00 mL volume of 0.500 M HCl was mixed with 100.00 mL of 0.500 M KOH in a constant pressure calorimeter. The initial tem- perature of the individual HCl and KOH solu- tions was 22.50°C. The final temperature of the solution after mixing was 25.80°C. The density of the solution was 1.02 g/mL. The specific heat of the solution was 3.97J•gl. degree-l. Identify the system and the surroundings. What gained heat? What lost heat? How much heat was gained...
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?
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.
a) Calculate the pH of 0.500 L of a buffer solution that contains 0.200 M of benzoic acid C6H5CO2H and 0.100 M sodium benzoate NaC6H5CO2. Ka = 6.3 x 10-5. b) Calculate the pH after .10 mL of 1.00 M H+ has been added. c) Calculate the pH after 10 mL of 1.00 M OH- has been added.
a)Calculate the change in pH that occurs when 0.00100 mol of gaseous HCl is added to a buffer solution that is prepared by dissolving 4.92g of sodium acetate(molar mass = 82.03gmol^-1) in 250 ml of 0.150 mol L^-1 of acetic acid solution? Assume no change in volume upon addition of either the sodium acetate or HCl. (Ka for acetic acid = 1.8*10^-5) b)Calculate the change in pH that occurs when 0.00100 mol of gaseous HCl is added to a buffer...
Answer Part B please 1.000 mol of formic acid (HCOOH) and 0.500 mol of sodium formate (NaCOOH) are added to water and diluted to 1.00 L. Calculate the pH of the solution. Ka 1.77 x 10-4 (4 marks) Enough HCl is added to the above solution (with negligible volume change) to bring the [H3O] up to 0.100 M. Find the pH of the resulting solution. (5 marks)
Calculate the change in pH when 1.0 mL of 1.00 M HCl is added to 100 mL of a solution of 0.100 M NaCH3COO and 0.100 M CH3COOH.