calculate the weight of bicine (167.19 g/mol) buffer to prepare a 150mM solution with total volume...
You wish to prepare 100 mL (total volume) of a buffer solution that is 0.025 M in carbonic acid, pH 7.25. You have solid H2CO3 and solid NaHCO3. Calculate how many grams of H2CO3 and HCO3- you need to weigh out to prepare this solution.
You will be provided with a 0.05 mol/L phosphate buffer solution. Weight out accurately the amount needed to prepare 50 mL of 1.0 x 10-2 mol/L benzoquinone and 1.0 x 10-2 mol/L hydroquinone. Transfer both to the same 50 mL volumetric flask and dissolve them with the phosphate buffer solution. This is your stock solution. What is the concentration of the stock solution?
calculate ph 7. A buffer solution prepared by adding 0.25 mol NaAc and 0.05 mol of HAC to enough v ater to make a total volume of 500 ml. Ka-1.8 x 10-5
The Hbr solution utilzed is 48% HBr by weight. The density is 1.49 g/mol. The volume used is 2.1 ml. Determine the moles of HBr used
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...
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 how to prepare 200 mL of a 0.1 M sodium phosphate buffer at pH 6.8 by combining two separate solutions of 0.1 M NaH2PO4.2H2O and Na2HPO4)? Molecular weight NaH2PO4.2H2O = 156 g/mol; molecular weight Na2HPO4: 141.96 g/mol. Use 6.86 as the pKa and prepare 250 mL of the separate solutions.
Buffer A Buffer B Mass of NaC2H3O2 used to prepare buffer (g) .149 1.49 Volume of buffer prepared (mL) 100.0 100.0 Molar concentration of HC2H3O2 in buffer (M) 0.1 1.0 Initial pH of buffer 4.0 4.0 Volume of 0.5 M NaOH to raise pH by 2 units (mL) 2 5 Volume of 0.5 M HCl to lower pH by 2 units (mL) 3 7 Volume of 0.5 M NaOH at equivalence point (mL) 4.5 10 Buffer capacity has a rather...
DATA TABLE Buffer A Buffer B Mass of NaC2H3O2 used to prepare buffer (g) 0.149 g 1.49 g Volume of buffer prepared (mL) 100.0 100.0 Molar concentration of HC2H3O2 in buffer (M) 0.1 1.0 Initial pH of buffer 4.24 4.33 Volume of 0.5 M NaOH to raise pH by 2 units (mL) 1.5 19.0 Volume of 0.5 M HCl to lower pH by 2 units (mL) 1.0 5.0 Volume of 0.5 M NaOH at equivalence point (mL) 1.75 19.75 3. ...
Calculate the weight/volume (w/v) percent of 15 g of sucrose in 350 mL of solution.