[megh44]

there are 2 principles that i am having difficulties understanding...and neither my text book nor my notes are helping me...

N2(g) + 3H2(g) = 2NH3(g) + 92KJ

(note you don't do all 3 to the equation, each one represents a different situation with the equation)
1) NH3 is liquefied?
2) if NH3 was a liquid and turned into a gas?

then i have 3 options to answer those 2 questions
a)causes net reaction towards the right
b)causes net reaction towards the left
c)no net effect on the equilibrium

i think 1 is b because i think the concentration goes up when something is liquified
and 2 is a because the concentration goes down

then the harder question....

Ag+(aq) + Cl-(aq) = AgCl(s) + 65.6 KJ
(note you don't do all 3 to the equation, each one represents a different situation with the equation)
1) some solid NaCl is added to the system
2) some AgNO3(aq) is added to the system
3) some solid AgCl is added to the system

a)causes net reaction towards the right
b)causes net reaction towards the left
c)no net effect on the equilibrium

i think 1 is B but i have no clue my teacher said that it breaks up into its ions and cuz its a solid does it go to the solid ? or does it go to both sides and ballance out so its c and the same applies to the other 2 questions i dont get what happens when you add things to the system i think 2 is A and 3 is B but i'm not sure

[Yggdrasil]

there are 2 principles that i am having difficulties understanding...and neither my text book nor my notes are helping me...

All of these problems are based on Le Chatelier's principle, so that would be the section of your notes/book to review.

N2(g) + 3H2(g) = 2NH3(g) + 92KJ

(note you don't do all 3 to the equation, each one represents a different situation with the equation)
1) NH3 is liquefied?
2) if NH3 was a liquid and turned into a gas?

then i have 3 options to answer those 2 questions
a)causes net reaction towards the right
b)causes net reaction towards the left
c)no net effect on the equilibrium

i think 1 is b because i think the concentration goes up when something is liquified
and 2 is a because the concentration goes down

Remember that the reaction requires gaseous ammonia.  If you liquify the ammonia, what happens to the concentration of gaseous ammonia?

then the harder question....

Ag+(aq) + Cl-(aq) = AgCl(s) + 65.6 KJ
(note you don't do all 3 to the equation, each one represents a different situation with the equation)
1) some solid NaCl is added to the system
2) some AgNO3(aq) is added to the system
3) some solid AgCl is added to the system

a)causes net reaction towards the right
b)causes net reaction towards the left
c)no net effect on the equilibrium

i think 1 is B but i have no clue my teacher said that it breaks up into its ions and cuz its a solid does it go to the solid ? or does it go to both sides and ballance out so its c and the same applies to the other 2 questions i dont get what happens when you add things to the system i think 2 is A and 3 is B but i'm not sure

NaCl is soluble in water.  So, when you add NaCl(s),  it dissociates into Na⁺ and Cl^-, increasing the concentration of Cl^-_(aq) in the solution.  The same goes with AgNO₃, another soluble salt.  AgCl is insoluble, so adding it to the solution does not increase the amount of Ag⁺_(aq) or Cl^-_(aq).  It just increases the amount of AgCl_(s) in the solution.

[megh44]

how do i know if a molecule is soluble in water?

[Yggdrasil]

Look up solubility rules in your chemistry text or on wikipedia:

http://en.wikipedia.org/wiki/Solubility_chart