Chapter 4 key terms

Question 1

How do ionic compounds dissolve in water?

Answer 1

dissociation where water surrounds the separated ions

Question 2

What is a precipitation reaction?

Answer 2

occurs when two solutions containing soluble salts are mixed and an insoluble salt is produced

Question 3

What are metathesis(Exchange) reactions?

Answer 3

reaction where it appears as though the anions in the react exchange/transpose

Question 4

How to write a Metathesis equation?

Answer 4

1) use the chemical formulas of the reactants to determine which ions are present
2) write formulas for the products: cation from one reactant, anion from the other. Use charges to write proper subscripts
3)check solubility rules. If either product is insoluble, a precipitate forms
4) balance the equation

Question 5

Where does the molecular equation come from?

Answer 5

the balanced metathesis equation

Question 6

How to derive net ionic equation from molecular equation?

Answer 6

1)molecular equation
2) rewrite equation to show the ions that form in solution when each soluble strong electrolyte dissociates into its ions. Only strong electrolytes dissolved in aqueous solutions are written in ionic form
3) net ionic equation: identify and cancel spectator ions

Question 7

What is included in the molecular equation?

Answer 7

lists the reactants and products without indicating ionic nature of the compounds
-states of matter are included

Question 8

What is included in the complete ionic equation?

Answer 8

all strong electrolytes are dissociated into their ions in both the products and reactant

Question 9

What is included in the net ionic equation?

Answer 9

everything that doesn’t change from left side of equation to right side is crossed out(these are the spectator ions)
-the remaining ions are the reactant that forms the product(product doesn’t have charges)

Question 10

What is a neutralization reaction?

Answer 10

reaction between an acid and a base

Question 11

When the base in a neutralization reaction is metal hydroxide, what are the products?

Answer 11

water and a salt

Question 12

When a carbonate or bicarbonate reacts with an acid, what is produced?

Answer 12

salt, carbon dioxide, and water

Question 13

Is oxidation loss or gain of electrons?

Answer 13

loss

Question 14

Is reduction loss or gain or electrons?

Answer 14

gain

Question 15

What is the oxidation number of elements in their elemental form?

Answer 15

0

Question 16

What is the oxidation number of a monatomic ion?

Answer 16

the same as its charge

Question 17

Do you count the subscript of an atom when determining oxidation number?

Answer 17

yes

Question 18

What are displacement reactions?

Answer 18

oxidation of metals by acids and salts