Use solution B to solve for the Ka of the weak acid.
Use Ka from above to solve for the pH of solution A. That gives you the first 3 numbers of the combination.
Use solution C and the Henderson-Hasselbalch equation to solve for the pH of that solution which will be last three numbers of the combination.
Captain Kirk, of the Starship Enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship. The combination is the pH of Solution A described below, followed by the pH of Solution C. (For example, if the pH of Solution A is 3.47 and the pH of Solution C is 8.15, then the combination to the safe is 3-47-8-15.) The chemist must find the combination using the information below. All solutions are at 25°C. (20 points)
Solution A is 50 mL of 0.1 M solution of the weak monoprotic acid HX.
Solution B is a 0.05 M solution of the salt NaX. It has a pH of 10.02.
Solution C is made by adding 15 mL of 0.25 M KOH to Solution A.
What are you suppose to do with Solution B to help solve for solution A.
My work:
10^-10.02 = 9.55x 10^-11= [H+]
[OH-]= 1.047 x 10^.4
Is 9.55 x 10^-11 the Ka of Solution B.
NaX--Na+ + X
X + H2O-- HX + OH
wat should i do to solve for B to solve for A.
what should I do after this
3 answers
how do u use Solution B to solve for the Ka?
Answered above.