HELP ME ANSWER THESE PLEASE ! biochemistryWatch
1) What is the actual function of a buffer system such as acetate / acetic acid?
a. To maintain the solution at neutral pH
b. To maintain the solution at the pKa
c. To ensure that the solution has no free H+ or OH- within a specific range
d. To maintain a constant pH in the event the concentration of an acid or alkali increases
e. To keep the solution within one pH unit of the pKa
2) In what area of the titration curve for carbonic acid (H2CO3) is the molecule fully deprotonated?
a. Far right
b. Far left
c. In the area about 1 pH unit higher than the pKa
d. At the second pKa value, given there are two deprotonations
e. At the center, at the pKa
3) What is the pH of a 0.1 mM solution of hydrochloric acid at 37°C?
4) What is the concentration of OH- in a solution with a H+ concentration of 1.3 X 10-4 M?
For Qs 2-4, you need to understand and use the Henderson-Hasselbach equation - I am not a biochemist but it should not be difficult for you to look this up, and use simple logic to substitute given values and work out the answers.