04/26

Question 1

what is the activity coefficient

Answer 1

it is the intermolecular interaction between solute and solvent

Question 2

what factors go into the activity coefficient

Answer 2

ionic strength

charge of ion

size of ion

Question 3

how does the ionic strength affect the activity coefficient

Answer 3

as the ionic strength (u) increases, the activity coefficient decreases

Question 4

why does the ionic strength affect the activity coefficient

Answer 4

as more ions are dissolved in the solution, it’s harder for the ions to see eachother and makes more of them dissolve

this pushes the reaction towards the right and more products will form

Question 5

how do the charges of ions affect the activity coefficient

Answer 5

highly charged ions have a larger decrease in the activity coefficient

Question 6

how do the sizes of the ions affect the activity coefficient

Answer 6

very small iona have very large hydrated spheres

Question 7

is a solution with low ionic strength salty or not

Answer 7

not very salty, less ions

Question 8

when can we neglect to include the activity coefficient

Answer 8

when the ionic strength is low (lower dilution) we can assume that the activity coefficient is 1 and can be neglected

Question 9

when can we not neglect the activity coefficient

Answer 9

when u (ionic strength) is high, there is a higher concentration of ions with more solubility, which results in more deviations in the activity coefficient and it cannot be neglected