7.012/7.013/7.014
Chemistry Self-Evaluation:

The following problems are designed to indicate the level of chemistry required for Introductory Biology classes 7.012, 7.013, and 7.014. Answers are below.

 

1) Covalent bonds - number of bonds per atom/charge on atoms:
What is wrong with the following structures? (correct the mistakes)

question 1 structures

 

2) Bond types:
What type of bond (ionic, covalent, hydrogen, VanDer Waals) is indicated by the squiggle ?

bond types - question 2

 

3) Hydrophobicity/Hydrophilicity:
Which of the following would you expect to be water-soluble?

hydrophobicity/hydrophilicity figure

 

 

4) Thermodynamics
Given the reversible chemical reaction where figure 4a:

figure 4b

Which of the following statements are true and which are false?
a) At equilibrium, [A]=[B]=[C]=[D].
b) Starting with [A]=[B]=[C]=[D]=1M, there will be a net reaction to the right.
c) Starting with [A]=1M, [B]=1M, [C]=0, and [D]=0, there will be a net reaction to the right.
d) Starting with [A]=0, [B]=0, [C]=1M, and [D]=1M, there will be a net reaction to the right.

 


 

Solutions

1) Covalent Bonds

covalent bonds answer

2) Bond Types

bond types answer

3) Hydrophobicity/Hydrophilicity

Hydro -Q3- answer

4) Thermodynamics
a) False
b) True
c) True
d) False

 

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