In the laboratory, a general chemistry student measured the pH of a 0.328 M aqueous solution of acetylsalicylic acid (aspirin), HC9H7O4 to be 1.987. Use the information she obtained to determine the Ka for this acid.

for the acid is

Explanation:

 cM              0             0

Give c = 0.328 M and

So dissociation constant will be:

Putting in the values we get:

b) mutualism

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aquifers are bounded above and below by impermeable rock. the driving force of groundwater movement in confined aquifers is pressure, rather than gravity.