CHM 1046 General Chemistry II Homework 7 Chapter 14 Part 1 Due on Sunday 3 November 2024 11 59 PM through Gradescope 1 A neutral solution of water at a particular temperature has a concentration of OH of 2 3 10 M What is Kw at this temperature 2 What mass of LiOH would need to be dissolved in water to make 300 0 mL of a solution with a pH of 11 71 Assume room temperature 3 Calculate the NH in a solution of 0 350 M ammonium cyanide NH CN Hint Use the Ka of HCN 4 9 10 and the Kb of NH 1 8 10 to calculate Kc for the reaction NH aq CN aq NH aq HCN aq 4 A 0 100 M solution of weak acid HA ionizes 2 00 What will be its percent ionization if 10 0 mL of this solution is diluted with 80 0 mL of water 5 A 0 250 g sample of the weak acid HA molar mass 150 0 g mol is dissolved in 50 0 g of water The freezing point of the resulting solution is 0 071 C Calculate the value of Ka for this acid Assume molality equals molarity in this solution Kf for water is 1 86 C m
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