Solution of tribasic sodium phosphate
A scientist wants to make a solution of tribasic sodium phosphate, Na_3PO_4, for a laboratory experiment. How many grams of Na_3PO_4 will be needed to produce 525 mL of a solution that has a concentration of Na^+ ions of 1.20 M?
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Question: Commercial grade HCl solutions are 39% by mass with a density of 1.20 g/ml. What is the molality of the solution?
Estimate the effective nuclear charge for an n=1 n=2 n=3 electron in sulfur. show steps.
Compute the theoretical yield of the product (in moles) for each initial amount of reactants.
By titration it is found that 27.5 mL of 0.155 M NaOH (aq) are required to neutralize 25.0 mL of HCl (aq). Calculate the concentration of the hydrochloric acid solution.
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Will the bond proceeds always be less than the face amount of the bonds when the contract rate is less than the market rate of interest?
Assume you completely hydrolyze a sample of the peptide Phe-Val-Lys-Ser using the appropriate protease in a phosphate buffer solution at pH=7. What two species would actually constitute the phosphate buffer.
You require a buffer with pH of 4.50. You have 1.00L of a solution of 1.80M acetic acid. How many grams of solid sodium acetate (NaC2H3O2, molar mass 82.0g/mol) must be added to give the pH of 4.50? The pKa of acetic acid is 4.74. Show all your work
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