Post a New Question

Chem still confused

posted by .

1.) A biochemistry student wants to make 4 liters of a phosphate solution using 48.6 g Na2HPO4 (FW=141.96) What is the concentration of this solution?

2. When she reaches the storeroom she finds that there is no Na2HPO4, however there is a bottle of hydrate Na2HPO4 * 7H20. (FW=268.07) how many grams of this salt should she use in order to make 4 liters with the same phosphate concentration as above?

  • Chem still confused -

    I thought I worked this once. And you want me to go through it again? I'll be glad to help bur this could go on forever. Please post my response and show your work. Explain fully at which step you get stuck and we can go from there.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Online chemistry lab preparing standards help?
  2. Chemistry

    Phosphate standards used to generate the calibration curve are usually made by first preparing a stock solution of known concentration, then diluting it to the required concentration. First prepare a stock solution that is 1.00 x 10-2 …
  3. chem

    15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.22 M lead(II) nitrate solution. What is the concentration of phosphate ions left in solution after the reaction is complete?
  4. Chemistry

    How man moles of sodium phosphate are there in 0.4 liters of 0.1M Na2HPO4 (MW=141.96 g/mol)?
  5. Chem wondering how to set it up

    1.) A biochemistry student wants to make 4 liters of a phosphate solution using 48.6 g Na2HPO4 (FW=141.96) What is the concentration of this solution?
  6. Chemistry HW!!!

    1. If I dilute 75 mL of 0.50 M CaF2 solution to a final volume of 375 mL, what will be the molarity of the resulting solution?
  7. Biochemistry

    Write up the recipe to make 100mL of a 200mM phosphate buffer, pH 7.0 by using: (a) only NaH2PO4 (MW 120g/mol) and NaOH (1.00M) (b) only Na2HPO4 (MW 142g/mol) and HCl (1.00M) (c) only Na2HPO4 and NaH2PO4 Please help me. I don't seem …
  8. Math

    George needs 50 liters of a solution that has a concentration of 30 g/ml for the manufacture of computer parts.  George has an unlimited supply of a solution with a concentration of  39 g/ml.  Using the Formula  C1*V1=C2*V2 answer …
  9. Math

    Shawn needs 190 liters of a solution that has a concentration of 18 g/ml for the manufacture of computer parts.  Shawn has an unlimited supply of a solution with a concentration of  37 g/ml.  Using the Formula  C1*V1=C2*V2 answer …
  10. Biochemistry

    You are asked to prepare 2 L of 50 mM sodium phosphate pH 7.0. The pK2 of phosphate is 6.8. What are the amounts of sodium phosphate mono basic monohydrate (NaH2PO4 • 1H2O, MW=137.99 Da) and anhydrous sodium phosphate dibasic (Na2HPO4, …

More Similar Questions

Post a New Question