CHAPTER 4

Question 1

If species j is in its standard state, what does aj,rat equal?

Answer 1

1

Question 2

If species j is in its standard state, what does aj,prac equal?

Answer 2

1

Question 3

If for rational system, the activity coefficient is 1, what does that mean?

Answer 3

The solution is ideal or pure

Question 4

How are ideal lines in activity vs. x determined?

Answer 4

aj=xj

Question 5

What is the difference between rational and practical system?

Answer 5

Rational uses ideal soln as reference
Practical uses ideally dilute soln as reference

Question 6

Whats the difference between strong electrolyte and weak electrolyte?

Answer 6

strong - dissociates completely
weak - dissociates partially

Question 7

when m goes to 0, what does the mean ionic activity coefficient equal?

Answer 7

1

Question 8

In electrolyte solutionos, how does concentration relate to the deviation from the ideal?

Answer 8

higher concentration, higher the deviation

Question 9

What are the simplification in the debye-huckel model?

Answer 9

a) only central ion is considered to have a discrete charge
b) solvent molecules are considered to form a continuous medium
c) the remaining ions are considere to form a continuous distribution of charge

Question 10

in the debye-huckel model, what does B and alpha depend on?

Answer 10

constants depend on solvent and temp