HTHSCI 1LL3 Lecture Notes - Lecture 2: Aspirin, Electronegativity, Alkalosis

• School: McMaster University
• Department: Health Sciences
• Course: HTHSCI 1LL3
• Professor: Terry McCurdy

Document Summary

Be(cid:272)ause it"s a loga(cid:396)ith(cid:373)i(cid:272) s(cid:272)ale, it does(cid:374)"t (cid:373)ake (cid:862)se(cid:374)se(cid:863) to ou(cid:396) (cid:271)(cid:396)ai(cid:374)s. Every factor of 10 difference in [h+] represents 1. 0 ph units, and. Every factor of 2 difference in [h+] represents 0. 3 ph units. Therefore, even numerically small differences in ph, can have profound biological effects. Use a ph meter read the number. Use ph paper (colour patterns indicate ph) Titrate the solution with precise amounts of base of acid in conjunction with a soluble dye, like phenolphthalein, whose color changes when a specific ph is reached. If you blow into a pink solution, carbon dioxide will get into the solution and goes from pink to clear the acidity increases (hydrogen ion concentration increases) The co2 coming in from your breath combines with the water to form carbonic acid. Because this is a weak acid it only partially disassociates and in this case forms bicarbonate ion and hydrogen ion. The hydrogen ion is what changes the acidity in solution.