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Assignment__2_10pts.rt - interaction supports this...

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Name : ETOX 102A Homework #2 (10 pts total) Turn in Completed Assignment (1 pt) DUE IN CLASS: Monday, January 24 th , 2011 Please answer the following questions in the space provided. 1). Chemical solubility in water is heavily influenced by two important factors: size of the compound and the ability to electrostatically interact with the partial charges of water molecules (i.e. dissolution). However, when large quantities of salt (Na + Cl - ) are added to water, there is reduction in the ability to dissolve chemical compounds. Generally, how does the addition of salts change water solubility? When water freezes at 0°C, ice becomes less dense than water in its liquid state. What unique chemical formation causes ice to float and what electrostatic
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Unformatted text preview: interaction supports this formation? (3 pts) 2). How is determining the K ow useful? What is the equation used to determine the K ow and how would you measure it in the lab? (3 pts) 3). A large amount of formic acid (p K a = 6), a weak acid [AH], was released into the junction (river mouth) where freshwater and saltwater meet. You have been asked to determine where the weak acid will be more soluble in order to track its movement. Using the Henderson-Hasselbach equation, draw a conclusion whether the weak acid will be more soluble in freshwater (pH=6) or saltwater (pH=8). (3 pts)...
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