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Flashcards in Unit 6 Deck (23)
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1

What is the process in which ions are formed from solute molecules by the action of the solvent?

Dissociation

2

What happens when a molecular substance ionizes in water?

Charged particles are formed and the more electronegative atom becomes a negative ion

3

What does solubility describe?

The amount of solute per amount of solvent required to produce a saturated solution at a given temperature

4

What does a saturated solution have?

A maximum amount of solute dissolved in that solvent at that temperature

5

What three things can affect the rate at which things dissolve?

Temperature
Agitation
Surface area

6

What is a supersaturated solution?

A solution that contains more solute than a similar saturated solution under the same conditions
Usually done by heating, adding solute, then cooking slowly

7

What is an electrolyte?
Examples?

A substance that when dissolved in water, forms ions which conduct an electric current
Ex: ionic compounds, acids and bases

8

What is a nonelectrolyte? Example?

Substance that when dissolved in water, does not produce ions and will not conduct an electric current
Ex: sucrose

9

What is a strong electrolyte?

A compound that breaks up (dissociates or ionizes) entirely or almost entirely and exists as ions in a solution

10

What is a weak electrolyte?

Has only a small amount of the dissolved compound existing as ions

11

Does solubility of or compounds effect whether they are strong or weak?

No

12

What is the difference between dissociation and ionization?

Dissociation separates ions while ionizations produces them

13

If the product of a reaction is insoluble or soluble, what form does it come in?

Soluble - aquesite
Insoluble - solid

14

What is the common ion effect?

It is when an ion that is common to 2 diluted will produce a precipitate or reduce ionization

15

What is Ksp? What is the formula?

The solubility product constant
The equilibrium constant of a saturated ionic solution

Ksp= products/reactants

16

What don't you include when calculating Ksp?

Solids or liquids

17

What does a large Ksp mean?

Means that there are many ions in solution (very soluble)

Increases solubility

18

What does a low Ksp mean?

Means that there are very few ions in a solution (it is insoluble)

Decreases solubility

19

What can solubility-product principles be applied to?

Only sparingly soluble substances

20

How do you solve a Ksp question when given the solubility of the solid and the volume?

First use that solubility to find the number of mols by dividing it by the total molar mass of the compound, then take that and put it into the equation C=n/v and use that concentration as the x value for the rest

21

What is a molecular compound that ionizes in water?

HCl

22

What is H3O?

It is the PH level thingies
Less of it means less acidic

23

How do you find out which compound is precipitated when given two compounds added with the same second Element?

You find which ever first element is more electronegative and that one is the one that doesn't precipitate
Ex: HBr KBr
H is more electronegative so KBr is precipitated