Chemistry 112

The last day!

Examples of types of problems found on the Final Exam

One of the statements made in class was that the Group 2 hydroxides are strong bases for both hydroxide ions. This question will test that assertion. Calculate the pH of a saturated solution of calcium hydroxide at 25 °C assuming: 1) both hydroxides ionize 100 % and 2) the first hydroxide ionizes 100 % but the second hydroxide does not. For part 2), find the per cent ionization of the second hydroxide. Is it valid to consider both hydroxides as strong?

The equation Co3O4(s) + Co(s)Co(OH)2(s) + CoO(s) can be correctly balanced two different ways. Find the two correctly balanced equations. Which is chemically more reasonable? Answer

The Table of Standard Reduction Potentials gives a reduction potential of 0.771 V for the reduction of Fe3+(aq) to Fe2+(aq) under standard acidic conditions. What is the reduction potential under standard basic conditions? Answer

How much useful work can be obtained from 1 g of sucrose (C12H22O11) by oxidation with O2 at room temperature? What is the standard potential associated with this reaction? Answer

Student Evaluation of Teacher (SET)

SET Number = 0500A