Rando

Question 1

polyatomic ions:

Answer 1

group of ions that have an overall charge

Question 2

polyatomic ions can have

Answer 2

multivalent metals as well. be careful about writing roman numerals

Question 3

binary acids

Answer 3

binary acids have HYDRO + ic

Question 4

ite

Answer 4

aight= homogenous= ous

Question 5

synthesis reactions can be

Answer 5

combustion reactions too. if they react with oxygen

Question 6

incomplete combustion products

Answer 6

combustion produces c, co, co2 and water

Question 7

hydrates

Answer 7

contain one or more water molecules in their crystal structures. you write as Cu x __h20. this is called copper either dehydrate, trihydrate, tetrahydrate etc. based on coefficient

they are loosely bonded to the water and can be broken upon heating. water is responsible for the blue colour in copper molecules. when it is not hydrated, it is called anhydrous. this produces an anhydrous salt. if water is added to the anhydrous salt again, it will become hydrated

Question 8

colour of solution- neutralization

Answer 8

there is an excess of either base or acid in that reaction

Question 9

cocl2 is used to test for

Answer 9

water. it is an anhydrous salt

Question 10

lime water Ca(OH)2

Answer 10

used to test for CO2

Question 11

metal oxide plus water

Answer 11

is a synthesis reaction which produces a base

Question 12

When a metal reacts with water

Answer 12

the products are metal hydroxide (base) and hydrogen gas.

Question 13

non-metal oxide plus water

Answer 13

is a synthesis reaction which produces an acid

Question 14

A metal hydroxide decomposing

Answer 14

into a metal oxide and water

Question 15

complete ionic eqn:

Answer 15

splits all compounds that are aq into ions. leave solid as solid and gas as gas

Question 16

net ionic eqn:

Answer 16

cancels out spectator ions to show what actually reacted

Question 17

two aqueous solutions reacting

Answer 17

NR

Question 18

don’t forget… ionic eqns

Answer 18

write states of ions in net and complete ionic eqns

Question 19

balancing eqn

Answer 19

when balancing eqns, the coefficients can be reduced

Question 20

how soap works

Answer 20

soap has hydrophilic and phobic tails. they surround and isolate the oil particles from the water long enough that they can be easily wiped away
- you need a fat source and a strong base to produce soap

Question 21

nonmetal dioxide + dioxide

Answer 21

→ nonmetal trioxide

Question 22

decomposition reactions rarely result in

Answer 22

single elements unless it is the reverse of a synthesis reaction that formed an ionic compound

Question 23

carbon dioxide often reacts to form a compound containing

Answer 23

a carbonate. the reverse is also common.

Question 24

what is always solid

Answer 24

metal oxides are always solid. all metal elements are solid

Question 25

other state stuff

Answer 25

mercury and bromine are liquid at room temperature

HOFBrINCl and noble gases are gases

Question 26

acids and bases decompose into

Answer 26

base decomposes into metal oxide and water

acid decomposes into nonmetal oxide and water

Question 27

when writing combustions

Answer 27

must write complete or incomplete combustion

Question 28

rando things

Answer 28

read subscripts vs charges on polyatomic ions carefully.

be careful about hydro vs. hypo

Question 29

spectator ion

Answer 29

present in solution but not included in a chemical reaction

Question 30

acid + carbonate

Answer 30

water and co2

Question 31

ammonium and hydroxide

Answer 31

ammonia gas, water

Question 32

Multivalent metal

Answer 32

A metal with more than one stable ionic form

Question 33

Lab about igniting things

Answer 33

Magnesium ribbon and acetylene combustion released huge amounts of heat and were very exothermic. produced water, co2

to make acetylene, you have to add cac2 to water which produces caOH and acetylene.