Chm142 exam 1 review - Study guides, Class notes & Summaries
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CHM142 Exam 1 Review with correct Solutions/Miami University
- Exam (elaborations) • 16 pages • 2024
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What is the total concentration of ions (in mol/L) in a solution obtained by dissolving 3.51 g of Cr(NO3)3 in enough water to make 351 mL of solution? 
(Molar mass of Cr(NO3)3: 238.01 g/mol) - Ans: 0.168 +/- 1% 
 
What is the concentration of sodium ions (in mol/L) in a solution obtained by mixing 90.5 mL of 0.181 M solution of Na2SO4 and 65.5 mL of 0.147 M solution of Na3PO4? 
Assume that volumes are additive. - Ans: 0.395 
 
Which of the following molecules is polar? - Ans: IF5 
 
What is the ...
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CHM142 Exam 3 Questions And Answers 2024 A+ Review
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CHM142 Exam 3 Questions And Answers 2024 A+ Review 
Buffer - ANS-Something that minimizes impact of the external force (in acid-base systems, force = pH) 
Acid-Base Buffer - ANS-A solution that will minimize changes in pH upon the addition of acid or base 
What is a buffer made of? - ANS-An acidic and a basic component - a conjugate acid-base pair (weak acid 
and conjugate base or weak base and conjugate acid) 
How do buffers work? - ANS-Through the common ion effect 
Common Ion Effect - ANS-Oc...
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