Dissolution & Equilibrium

Question 1

what does → mean

Answer 1

the reaction is only going one way

Question 2

what does –> and <– together in a reaction mean

Answer 2

equilibrium e.g. the rates of reaction forward & backward are equal

Question 3

what is the formula for equilibrium constant

Answer 3

K = [products]/[reactants]

where [] = concentration in mol/L

Question 4

what is the concentration of pure solids and pure liquids

Answer 4

1

Question 5

how is the concentration of gas worked out

Answer 5

pressure of the gas

Question 6

what does K > 1 mean

Answer 6

excess product (all the solid has dissolved)

Question 7

what does K < 1 mean

Answer 7

very tiny concentration of ions in the solution

Question 8

what is the concentration of ions required for a species to be soluble

Answer 8

> 0.1 M

Question 9

what is the concentration of ions required for a species to be moderately soluble

Answer 9

0.01 - 0.1 M

Question 10

what is the concentration of ions required for a species to be insoluble

Answer 10

< 0.01 M

Question 11

what function can we use to understand solubility

Answer 11

coloumb’s law