Na2HPO4 = 2Na+ + HPO4-2
NaH2PO4 ---> Na+ + H2PO4-
Na3PO4 --> 3Na+ + PO4-3
then
reactions:
PO4-3 + H+ =HPO4-2
HPO4-2 + H+ = H2PO4-
charge balance:
[ChargE] = [Na+](0.02*2 +0.02*1 + 0.01*3) + [HPO4-](0.02) + [H2PO4-2](0.02) + [PO4-3](0.01)
You prepare exactly 1.00 L of a solution containing 0.02 mol of. Na_2HPO_4, 0.02 mol of...
One will prepare a buffer solution of pH =5.00. 1.00 L of a solution containing 1.00 moles of (CH3COOH) with pKa=4.77. How many grams of (CH3COONa) is to be added to the solution?
You have prepared a solution by dissolving 0.20 mol glutaric acid (C5H8O2, pKa1 = 4.34, pKa2 = 5.42) and 0.10 mol mandelic acid (C8H8O3, pKa = 3.86) in 1.00 L of water. Write all equilibria occurring in solution as well as mass balance and charge balance expressions for this system. Determine the pH of this solution. I was suggested to use a spreadsheet. I can work the spreadsheet, but I can't get to equations that describe the whole system.
1. Your task is to prepare a buffer solution of 1.00 L of 0.250 M acetic acid and solid sodium hydroxide. Start by writing the equation for the reaction that will form the buffer (hint: you must have both acetic acid and acetate ion in the solution; where will the acetate ion come from? Neglecting the volume change on addition of NaOH (MM 40.0 g/mol), what mass is required to produce a buffer of pH 3.75? What pH will the...
Your task is to prepare a buffer solution of 1.00 L of 0.250 M acetic acid and solid sodium hydroxide. Start by writing the equation for the reaction that will form the buffer (hint: you must have both acetic acid and acetate ion in the solution; where will the acetate ion come from? Neglecting the volume change on addition of NaOH (MM 40.0 g/mol), what mass is required to produce a buffer of pH 3.75? What pH will the buffer...
What is the molarity of 0.500 L of a potassium chromate solution containing 0.0650 mol of K2CrO4? What is the molarity of 4.50 L of a solution containing 0.206 mol of urea [(NH2)2CO]? What mass of HCl is present in 825 mL of a 1.25 M solution? What mass of isopropyl alcohol (C3H8O) is dissolved in 2.050 L of a 4.45 M aqueous C3H8O solution?A 50.0 mL sample of saltwater that is 3.0% m/v is diluted to 950 mL. What...
If 500 mL of a solution containing 1.00 g of barium nitrate (199.33 g/mol) is combined with 500 mL of a solution containing 1.00 g of sodium sulfate (142.03 g/mol), will there be a precipitate? Barium sulfate has a K sp value of 9.1 × 10 −11
A student adds 0.0035 mol of NaF to 1.00 L of 0.02 M barium nitrate, Ba(NO3)2. Which of the following statements is correct? Ksp = 1.5 × 10–6 for BaF2. Assume there is no volume change upon addition of NaF. One must know Ksp for barium nitrate to make a determination Barium fluoride precipitates until the solution is saturated. The solution is unsaturated and no precipitate forms. The solubility of barium fluoride is increased upon the addition of fluoride ions....
In order to prepare pH = 7.00 of 1.00 L buffer solution, you added 12.43 g tris (MW: 121.135), calculate the mass in g of tris hydrochloride (MW: 157.596) that you will need to add. pKa = 8.072. Show your calculation process.
A solution containing 10.0g / L of urea (Molar mass 60.0 g/mol) is isotonic with 5.0% solution of non-volatile solute. What is the molar mass of the solute in the second solution?
What is the pH of a solution containing 0.138 mol L-1 NH3 and 0.253 mol L-1 NH4+? Round your answer to 2 decimal places. Remember you can find KA and/or KB values in your textbook in chapter 15.