Unit 7: solubility, Effect of pH , common ion effect

Question 1

what makes an ionic salt soluble?

Answer 1

if more than 3 grams can be dissolved in 100mL of water

Question 2

what happens to an ionic salt when it dissolves?

Answer 2

It dissociates into ions which then makes it capable of conducting electricity

Question 3

which groups are soluble

Answer 3

Group 1, Ammonium, Nitrate

Question 4

what actually happens to “insoluble salts”

Answer 4

they dissolve a very small amount, and the amount doesn’t make a huge difference to the reaction

Question 5

what do insoluble salts make a difference in?

Answer 5

equilibrium

Question 6

what is solubility?

Answer 6

the solute ( ionic salt) that is able to dissolve in water to form a saturated solution

Question 7

what is the variable that represents solubility?

Answer 7

S

Question 8

what are the units of solubility?

Answer 8

g/L or mol/L

Question 9

What part of the rice table is Molar solubility talking about?

Answer 9

C and it is -x

Question 10

For solubility do the reactants get decreased or increased

Answer 10

decreased, and the products get increased

Question 11

what is the molar solubility equation?

Answer 11

mol/L

Question 12

What are some strong acids?

Answer 12

HCL, HBr, HI, HNO3, H2SO4,HCLO3, HCLO4

Question 13

what are some strong bases?

Answer 13

group 1and 2 hydroxides, except Be and Mg

Question 14

What happens when you increase the pH?

Answer 14

1. ) solution become more basic

2. ) increase OH-1

Question 15

what happens when you decrease the pH

Answer 15

1. ) solution becomes more acidic

2. ) increase H+

Question 16

what happens when you add an ion that is already present in the solution, and what will that do the equilibrium?

Answer 16

it will shift the equilibrium based on the common ion effect

Question 17

what happens when you add the opposite ion to a reaction

Answer 17

neutralization will take place and that ion will be removed

Question 18

What is a way that we can determine if an ionic compound is not soluble

Answer 18

looking at the Ksp values

Question 19

what does a large Ksp indicate?

Answer 19

the compound is soluble and will dissolve completely

Question 20

what does a small Ksp value indicate?

Answer 20

the compound is insoluble and will dissolve only in small amounts

Question 21

what happens when a soluble ionic compound is introduced into an equilibrium that is typically insoluble?

Answer 21

it will reduce the solubility of the insoluble ionic compound if they share a common ion

Question 22

What happens to the Ksp when two solutions have a common ion?

Answer 22

the smaller Ksp will precipitate first?