Chemical Reactions

Question 1

Signs of chemical reaction

Answer 1

Evolution of heat and light
Formation of gas
Precipitate
Color change

Question 2

Chemical reaction equation

Answer 2

A+B->C+D

Question 3

Symbol means

->

Answer 3

Produces/ forms

Question 4

Symbol means

+

Answer 4

Plus/and

Question 5

Triangle ->

Answer 5

Reactants are heated

Question 6

Squiggle ->

Answer 6

Electricity added

Question 7

Individual atom is called

Answer 7

Atom

Question 8

Covalent substance is called

Answer 8

Molecule

Question 9

Ionic substance is called

Answer 9

Unit

Question 10

Law of conservation of mass

Answer 10

Mass is neither created nor destroyed

Total mass stays the same

Question 11

Balancing equations

Answer 11

Equal on both sides

Question 12

Combustion

Answer 12

The burning of any substance in O2 to produce heat (exo)

Question 13

Combustion equation

Answer 13

A+O2->B

Question 14

Synthesis

Answer 14

The combination of two or more substances to form a compound
Omg one product

Question 15

Synthesis equation

Answer 15

A+B->AB

Question 16

Decomposition

Answer 16

A compound breaks down into 2 or more less complex substances
Usually by heat or electricity

Question 17

Decomposition equation

Answer 17

AB->A+B

Question 18

Single replacement

Answer 18

Reactants are an element or compound
One element replaces another in a compound
Metal replaces metal
Nonmetal replaces nonmetal

Question 19

Single replacement equation

Answer 19

A+BC->B+AC

Question 20

Double replacement

Answer 20

Ions in two compounds change partners

Cation of one compound switches with the cation of the other

Question 21

Double replacement equation

Answer 21

AB+CD->AD+CB

Question 22

If there is one product what is it

Answer 22

Synthesis

Question 23

If there is more than one products and only one reactant it is

Answer 23

Decomposition

Question 24

> 1 reactants
1 products
Reactants element and compound

Answer 24

Single

Question 25

>1 reactants >1 products Reactants compound and compound

Answer 25

Double

Question 26

>1 reactants >1 products Reactants O2 and C?H?

Answer 26

Combustion

Question 27

Reactants in aqueous solutions

Answer 27

Double replacement reactions only work

Question 28

Aqueous indicates

Answer 28

Compound is dissolved

Question 29

Dissolved ionic compounds are separated

Answer 29

Into their ions

Question 30

Steps to write complete ionic equation

Answer 30

Use solubility table for which will dissolve Write state Desperate all aq into ions, include subscripts as coefficients and charges

Question 31

Steps to write net ionic

Answer 31

Start with complete ionic equation Cross out spectator ions Rewrite without spectator

Question 32

Spectator ions

Answer 32

The ions that are the exact same on both sides

Question 33

If all are spectators this means

Answer 33

No net reaction | change sign to _>

Question 34

What are always aqueous

Answer 34

Sodium and nitrate

Question 35

Combustion products

Answer 35

Contain oxygen | Hydro carbons form CO2 + H2O

Question 36

Reactants: Synthesis element + element

Answer 36

One product Just based on charges Remember diatomic Ex H2+Cl2-> HCl

Question 37

Reactants: Synthesis Nonmetal_oxide +H2O->

Answer 37

Products Acid Remember polyatomic ions and naming acids

Question 38

Reactants: Synthesis Metal_oxide + H2O->

Answer 38

Metal_hydroxide (OH)

Question 39

Reactants: acid | Decompose

Answer 39

Acid-> | nonmetal_oxide + H2O

Question 40

Reactants: decompose | Metal_hydroxide->

Answer 40

Metal_oxide + H2O

Question 41

Reactants: decompose | Metal_carbonate->

Answer 41

Metal_oxide +CO2

Question 42

Reactants: decompose | Metal_chlorate->

Answer 42

Metal_chloride + O2

Question 43

Decompose with heat | Heavy metal_oxide->

Answer 43

Metal + O2

Question 44

Decompose with electricity | Product->

Answer 44

Element + element Example water-> H2+O2

Question 45

When predicting products what is one thing that is necessary to remember after predicting

Answer 45

TO BALENCE

Question 46

Single replacement. What needs to be true for it to occur

Answer 46

Metal will replace metal ONLY IF the one in the compound is less reactive or LESS CUTE

Question 47

Single replacement | Metal (NA or CA) + water->

Answer 47

-> metal_hydroxide + H2

Question 48

``` Single replacement Active Metals (Zn Fe Al) + acid -> ```

Answer 48

-> salt (ionic compound) + H2

Question 49

Active series non metals

Answer 49

``` F Cl Br I Halogens row ```

Question 50

What do halogens and the cutesy chart have in common (SR)

Answer 50

Halogens will replace less reactive halogens

Question 51

Transition metals only change charge in

Answer 51

Single replacement

Question 52

What needs to be true of reactants for double replacement

Answer 52

Both reactants have to be aqueous

Question 53

In double replacement, which switch

Answer 53

Cations

Question 54

If everything is aqueous in a double reaction then what

Answer 54

No reaction

Question 55

Neautrilization

Answer 55

A reaction between an acid and a base which yields a salt and water Double replacement