7. What is the hydrogen ion concentration in solution at a pH 8.3? 8. Describe h

Question

7. What is the hydrogen ion concentration in solution at a pH 8.3? 8. Describe how you would prepare a 0.1 M phosphate buffer with a pH of 7.2. What ratio of conjugate base to acid would you use? 9. What is the osmolarity of a 1.3 M solution of sodium phosphate (Na.PO.)? Assume 85% ionization for this solution. A dialysis bag containing a 3 M solution of the sugar ructose is placed in the following solutions. In each case, give the directio a. 1 M sodium lactate b. 3 M sodium lactate c. 4.5 M sodium lactate 10.

Explanation / Answer

7.

We know the formula of pH as,

pH = - Log[H+]

Now substitute the given pH value,

8.3 = - Log[H+]

Log[H+] = - 8.3

[H+] = 10-8.3

[H+] = 5.01 * 10-9 M

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