Unit 7: solubility, Effect of pH , common ion effect Flashcards
what makes an ionic salt soluble?
if more than 3 grams can be dissolved in 100mL of water
what happens to an ionic salt when it dissolves?
It dissociates into ions which then makes it capable of conducting electricity
which groups are soluble
Group 1, Ammonium, Nitrate
what actually happens to “insoluble salts”
they dissolve a very small amount, and the amount doesn’t make a huge difference to the reaction
what do insoluble salts make a difference in?
equilibrium
what is solubility?
the solute ( ionic salt) that is able to dissolve in water to form a saturated solution
what is the variable that represents solubility?
S
what are the units of solubility?
g/L or mol/L
What part of the rice table is Molar solubility talking about?
C and it is -x
For solubility do the reactants get decreased or increased
decreased, and the products get increased
what is the molar solubility equation?
mol/L
What are some strong acids?
HCL, HBr, HI, HNO3, H2SO4,HCLO3, HCLO4
what are some strong bases?
group 1and 2 hydroxides, except Be and Mg
What happens when you increase the pH?
- ) solution become more basic
2. ) increase OH-1
what happens when you decrease the pH
- ) solution becomes more acidic
2. ) increase H+
what happens when you add an ion that is already present in the solution, and what will that do the equilibrium?
it will shift the equilibrium based on the common ion effect
what happens when you add the opposite ion to a reaction
neutralization will take place and that ion will be removed
What is a way that we can determine if an ionic compound is not soluble
looking at the Ksp values
what does a large Ksp indicate?
the compound is soluble and will dissolve completely
what does a small Ksp value indicate?
the compound is insoluble and will dissolve only in small amounts
what happens when a soluble ionic compound is introduced into an equilibrium that is typically insoluble?
it will reduce the solubility of the insoluble ionic compound if they share a common ion
What happens to the Ksp when two solutions have a common ion?
the smaller Ksp will precipitate first?
