Calculate the volume of 0.20 mol L-1KH2PO4 and the volume of 0.10 mol L-1 NaOH required
to prepare 50.0 mL of buffer with a formal (or total) concentration of H2PO4 - of 0.020 mol
L-1 and a pH = 6.3.
Calculate the volume of 0.20 mol L-1KH2PO4 and the volume of 0.10 mol L-1 NaOH required...
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...
7. a) Calculate the pH of a 0.10 mol l-1-methylamine at 25 ° C. b) How many moles of HCl must be added to 0.25 l of solution (according to a) in order to obtain maximum buffer effect? What is pH? Show the calculations. Disregard volume changes c) as the pH becomes in 1.00 l solution of a) after addition of 0.20 mol HCl then ignoring the volume change?
help me out, please! answer all the multiple choice. (15) A phosphate buffer solution is prepared by mixing 100. mL. of 0.300 M KH PO, and 150.ml 0.500 M K HPO (a) Calculate the molar concentrations of H:PO, and that of HPO,2 in the buffer solution. (b) What is the pH of the buffer solution? (H,PO, has K,-6.2 x 10 (c) Write a net ionic equation for the bufering reaction against a strong acid, Hjo (d) Calculate the new concentration...
Which one of the following aqueous solutions, when mixed with an equal volume of 0.10 mol L–1 aqueous HCN, will produce a buffer solution? 0.350 mol L –1 NaOH 0.10 mol L–1 CH3COOH 0.20 mol L –1 HCl 0.20 mol L–1 NaCN 0.10 mol L –1 HCl
Part B: A 50.0 mL volume of 0.15 mol L−1 HBr is titrated with 0.25 mol L−1 KOH. Calculate the pH after the addition of 14.0 mL of KOH. Express your answer numerically. Part C: A 75.0 mL volume of 0.200 mol L−1 NH3 (Kb=1.8×10−5) is titrated with 0.500 mol L−1 HNO3. Calculate the pH after the addition of 28.0 mL of HNO3. Express your answer numerically. Part D: A 52.0 mL volume of 0.350 mol L−1 CH3COOH (Ka=1.8×10−5) is...
50.0 mL of 0.10 M HNO2 is being titrated with 0.20 M NaOH. What is the pH after 25.0 mL NaOH has been added? What is the pH after 35.0 mL NaOH has been added?
Calculate the volume of 0.531 mol/L propanoic acid (C2H5COOH, pKa = 4.88) that must be added to 60.0 mL of 0.450 mol/L calcium propanoate (Ca(C2H5COO)2) to prepare a buffer solution with a pH of 5.00. Calculate the volume of 0.531 mol/L propanoic acid (CH-COOH, PK, -4.88) that must be added to 60.0 mL of 0.450 mol/L calcium propanoate (Ca(CH.COO).) to prepare a buffer solution with a pH of 5.00. 77 mL 98 mL 136 ml 68 ml 220 mL 11...
A 52.0-mL volume of 0.350 mol L−1 CH3COOH (Ka=1.8×10−5) is titrated with 0.400 mol L−1 NaOH. Calculate the pH after the addition of 21.0 mL of NaOH.
Determine the pH increase of a solution after 0.10 mol of NaOH is added to 1.00 L of a solution containing 0.15 M HC2H3O2 and 0.20 M NaC2H3O2. If this same amount of NaOH was added to 1.00 L of pure water then what would be the pH increase of the resulting solution? Compare these two values. pH increase in buffer: ? pH increase in pure water: ?
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).