Below is presented
systems that contain solutions
aqueous NaCl in three different
conditions, maintained at temperature
constant. a) Determine which
system(s) are in equilibrium.
Explain your answer. b) Description
what happens in each system if
a small amount of NaCl
solid for addition.
Systems
||
Solution
saturated
of NaCl
Body of
- NaCl floor
Solution
diluted
of NaCl
a) System 1 (saturated solution of NaCl) is in equilibrium. This is because the solution is saturated, meaning that the rate of dissolution of NaCl is equal to the rate of precipitation of NaCl.
b) In System 1 (saturated solution), if a small amount of NaCl solid is added, the solution will remain saturated. This is because the equilibrium will shift to the right to dissolve the additional NaCl solid, maintaining the saturation of the solution.
In System 2 (NaCl on the floor), if a small amount of NaCl solid is added, the solid will dissolve into the solution until the solution becomes saturated. However, the system is not initially at equilibrium, so it will reach a new equilibrium state after the addition of the NaCl solid.
In System 3 (diluted solution of NaCl), if a small amount of NaCl solid is added, the solid will dissolve into the solution until the solution becomes saturated. Similar to System 2, the system is not initially at equilibrium, so it will reach a new equilibrium state after the addition of the NaCl solid.