CHEM101 Study Guide - Ko 2, Amphoterism, Sodium Hydroxide

• School: University of Alberta
• Department: Chemistry
• Course: CHEM101
• Professor: Yoram Apelblat

Document Summary

Wed, oct 8, 5pm sun, oct 12, 5pm. Quiz (for marks) thursday, oct 16 tuesday, oct 21. Measure ph (and 2nd term equilibrium calculations) ph < 7 solution is acidic ph = 7 ph > 7 solution is neutral solution is basic. Otherwise, the smaller ka, the weaker the acid. Strong acids hclo4, hno3, hi, hbr, hcl, H2so4 (only 1st proton) partial dissociation (calculations in 2nd term) Hf also has h bonding making it more difficult to break and therefore is a weak acid. Unlike in the previous example, the same bond h o is broken and we want to see the effect of x and its environment on the degree of dissociation. 3. 7 x 10 8 very strong medium strong weak very weak. Metal oxide (ionic) produces a base in h2o. Na2o + h2o 2 na+ + 2 oh . Extra oxygens (higher electronegativity) mean that the electron density shifts from the h o bond.