Write the a) mass balance expression(s) and b) charge balance expression for barium sulfate, BaSO4, in 0.10 M HCl.  The pertinent equilibria are:   BaSO4(s) =  Ba2+  +  SO42- H3O+  +  SO42-  =  HSO4- +  H2O 2H2O  =  H3O+  +  OH-

The Kp for an amine is 4.628 × 10-³. What percentage of the amine is protonated if the pH of a solution of the amine is 9.848? Assume that all OH¯ came from the reaction of B with H,O.

Given the equilibrium reaction, BaCO3(s) ⇌ Ba2+(aq) + CO32-(aq)          Ksp = 2.58 x 10-9 What is the molar solubility (s) of BaCO3 in 0.10 M Ba(NO3)2?

Which reagent(s) sequence(s) is/are optimum for preparing butanoic acid from 1-propanol? i. K2Cr2O7 in acidii. (1) PBr3; (2) NaCN; (3) H2O; (4) [H+] iii. (1) NaCN; (2) H2O; (3) [H+]iv. LiAlH4

C6H4NH₂COOH, para-aminobenzoic acid (PABA) is used in some sunscreens. Calculate the concentrations of hydronium ion and para-aminobenzoate ion, C6H4NH₂COO- in a 0.055 mol dm-³ solution of the acid. Ka-2.2 x 10-5

Calculate the concentration of dissolved sulfate ion in solution if 75.0 mL of a 0.0250 M Ba(N03)2 aqueous solution is mixed with 25.0 mL of 0.0100 M sodium sulfate aqueous solution and allowed to come to equilibrium. Ksp for barium sulfate is 1.5x10- Answer:

9) The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino acid, H₂X+) are Kal = 4.6 × 10-3 and Ka2=2.0 × 10-10. What is the pH of 50.00 mL of a 0.050 M solution of alanine after 37.50 mL of 0.100 M NaOH has been added? Para Ofind moles

Determine the pH at the point in the titration of 40.0 mL of 0.200 M H,NNH2 with 0.100 M HNO, after 80.0 mL of the strong acid has been added. The value of Kb for H,NNH, is 3.0 x 10-6.

35). Will a precipitate of magnesium fluoride form when 400. mL of 1.5 x 10-3 M MgCl2 are added to 600. mL of 2.5 x 10-3M NaF? (Ksp of MgF2 = 6.9 x 10-9) Calculate Q and explain your answer. (b) Calculate the new concentration of Mg2+ ion.                              (c) Calculate the new concentration of F– ion.                                   (d) Show the Q expression.                                                                (e) Calculate Q.      (f) Will a precipitate of magnesium fluoride form?

What is the pH of a saturated solution of Al(OH)3 at 25 oC, given that Ksp= 8.09 x 10-24 at this temperature?