8. 8 pts. The setup of an artificial kidney dialysis system is shown below. Assuming the blood volume of a 180 lb male is 4.70 L, how much dialyzing solution would be required to reduce the sodium content of the blood from 230 mM to 145 mm? Line artery to vein pump Line from apparatus to vein Tubing made of a selectively permeable membrane Dialysing solution Fresh dialysing solution Used dialysing solution (with urea and excess salts) 4. The amino acid to the right would exist as drawn: a. Below pH 2.2 b. Between pH 2.2 and 6.00 c. Between pH 6.00 and pH 9.4 d. Above pH 9.4 e. The amino acid shown would not exist at any pH HN- 5. Provide the charge of the following polypeptide at pH 8.5: DFYWRPA a. -2 b. -1 c. 0 d. +1 e. The correct answer isn't listed a. acetic acid, carbonic acid, nitrous acid, phosphoric acid b. carbonic acid, acetic acid, nitrous acid, phosphoric acid c. acetic acid, nitrous acid, carbonic acid, phosphoric acid d. phosphoric acid, nitrous acid, acetic acid, carbonic acid e. carbonic acid, phosphoric acid, nitrous acid, acetic acid NH3 6. List the acids in INCREASING order of strength (weakest to strongest): nitrous acid (Ka = 4.0 104) carbonic acid (Ka = 4.4 x 10-7) acetic acid (Ka = 1.7 x 10-5) phosphoric acid (Ka = 7.3 10-)