hw 1 - Homework 1 16:36 ONE Read through and study the...

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Unformatted text preview: Homework 1 16:36 ONE Read through and study the following worked out example carefully. Once you believe you understand it, answer the question at the bottom and then. proceed to complete in order questions 2 through 4 on your homework. Question: Rank the following acids in order of increasing (weakest to strongest) acid strength. HCl, HI, HF Solution: Step 1: All of the acids listed above are binary because they contain only hydrogen and 1 other type of element. Step 2: Since all of the acids listed above are binary they are ranked in strength based on the size of their anions. Each anion has a parent element that you can find on the periodic table. The closer to the bottom and further left on the periodic table that parent element is, the larger it is. We must first identify what the anion is in each acid, and what period its parent element is located in on the periodic table. We do not have to worry about the group number because all of the parent elements of these anions are in the same in group on the periodic table. Acid: HCl Anion: Cl- Parent Element of Anion: Cl Period of Parent Element: 3 Acid: HI Anion: I- Parent Element of Anion: I Period of Parent Element: 5 Acid: HF Anion: F- Parent Element of Anion: F Period of Parent Element: 2 Step 3 : The acid which the largest anion is the strongest, and the acid with the smallest anion is weakest. The period number of the parent element of anion is directly related to its size because all of the parent elements of the anions are in the same group on the periodic table. The larger the period number the larger the size of the anion. Based on that information the following correct ranking is obtained. HF < HCl < HI According to the information presented in the example above, what is the name of the weakest acid? TWO The following problem is similar to the example you just studied, but you are now responsible for solving step 3 on your own. Read through and study steps 1 and 2 carefully. Once you believe you understand it, provide an answer for step 3 by completing the question at the bottom. Then proceed to homework questions 3 and 4. Question: Rank the following acids in order of increasing (weakest to strongest) acid strength. H 2 S, H 2 Te, H 2 O Solution: Step 1: All of the acids listed above are binary because they contain only hydrogen and 1 other type of element. Step 2: Since all of the acids listed above are binary they are ranked in strength based on the size of their anions. Each anion has a parent element that you can based on the size of their anions....
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This note was uploaded on 02/21/2011 for the course CHEM 1212 taught by Professor Suggs during the Spring '08 term at UGA.

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hw 1 - Homework 1 16:36 ONE Read through and study the...

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