{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chem 120 Pre Exam II Practice

Chem 120 Pre Exam II Practice - are contained in a 2.0 L...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 120 Exam II Practice I. For the reactions below: 1. 15.0 g of zinc solid with 25.0 ml of 2.5 M HI solution 2. 35.0 g of magnesium bicarbonate solid with 35.0 ml of 6.00 M HBr a. Write balanced molecular and net ionic equations for the reactions, complete with subscripts. Identify the type of reactions, i.e. precipitation, gas formation, neutralization, decomposition, etc. b. Determine which is the limiting reactant when applicable . c. Calculate the mass of solid produced or the volume of gas produced at 22.5 o C and 750 mmHg. II. Write the oxidation states/numbers underneath each symbol and indicate with arrows the oxidized/reduced specie(s) in the reactants. Indicate also which is the oxidizing/reducing agent. 2 MnO 4 - + 5 C 2 O 4 -2 + 6 H + ------> 2 Mn 2+ + 10 CO 2 + 8 H 2 O III. Balance the following oxidation equations. Show the two half- reactions. Fe 2+ + Ce 4+ ------> Fe 3+ + Ce 3+ IV. 3.20 grams of oxygen gas, 2.01 grams of hydrogen gas and 14.0 grams of nitrogen gas
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: are contained in a 2.0 L container at 22.0 o C. a. Compare their kinetic energy and explain briefly. b. Compare their partial pressure and explain briefly c. Compare their effusion rate and explain briefly d. Calculate the ratio of their effusion rate. V. A pioneer stuck a 503 gram iron ball at 800 0C(Cp of Fe = 0.450 J/g.K)) into his coffee pot containing 0.250 L coffee. Assuming the density of coffee is 1.10 g/ml and the heat capacity is 4.10 J/g.K, calculate the final temperature of the coffee. VI. a. Calculate the ∆Hrxn for the following reactions: a.1. N 2 (g) + 3 H 2 (g) -----> 2 NH 3 (g) a.2. 4 NH 3 (g) + 5 O 2 (g) ----> 4 NO(g) + 6 H 2 O(l) a.3. H 2 (g) + ½ O 2 (g) -----> H 2 O(g) b. Using Hess’s Law and the information given in part a, calculate the ∆Hrxn for: ½ N 2 (g) + ½ O 2 (g) ----> NO(g)...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern