midetermexam2005 - But this was an exception to last year...

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Final answers to last year's midterm 1)a) 1.07 x 103 ppm b) 0.137g (Note: there is a mistake to the molar mass of lead nitrate. If using the right molar mass (331.2 g/mol), it should be 0.160g.) 2) Note that the Ksp is very small. In this case, water dissociation cannot be ignored. However, students were allowed last year to treat the problem as if water dissociation can be ignored for simplicity sake.
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Unformatted text preview: But this was an exception to last year for the purpose of this question. The answer is not quite correct. a) 4.75 (If you consider water dissociation, you should have pH=7.0. Try it yourself.) b) 1.87 c) 0.6M d) 2.78 x 10-4 , 0.403 e) 3.18 3) a) 69.2% b) 52.8%, 47.2% 4) a) 3.34, 23.1% b) 8.58 c) 7.0 d) 3.71 5) a) 3.78 b) 3.86 6) a) 0.00833, 0.09167, 6.88 x 10-6, 3.30 x 10-15 b) 1.55 c) 4.79...
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This note was uploaded on 12/11/2009 for the course CHM Chm2354 taught by Professor Teitlebaum during the Spring '09 term at University of Ottawa.

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midetermexam2005 - But this was an exception to last year...

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