Chemical final grade nine reveiw

Question 1

how to calculate the concentration

Answer 1

1work out the chemical formula of the solute
2 work out the mass of one mole of the solute
3 work out how many moles are in a given mass
4 convert the amount of moles in a given volume(the solvent) to 1,000 cm (1 dm)

Question 2

Concentration units

Answer 2

mol/dm squared

Question 3

what do acids do with their protons

Answer 3

donate them in reactions

Question 4

What can aluminum and zinc do with reactions of bases

Answer 4

they can neutralize both acids and bases

Question 5

what is one mole of gas at room temprature

Answer 5

24,000 cm2

Question 6

what is a mole

Answer 6

is the mass of a substance that contains 6.02 times 10 to the 23rd power atoms/molecules of that substance

Question 7

why can carbon dioxide be collected by downward displacement

Answer 7

becuase C02 is denser than the air around it

Question 8

why can C02 be collected by displacement of water

Answer 8

C02 has very low solubility so it will not dissolve in the water

Question 9

what are metal oxides at room temprature

Answer 9

solids

Question 10

are metal oxides bases or acids

Answer 10

bases,when the dissolve they form a alkali solution

Question 11

what is Mg0

Answer 11

a white powder

Question 12

what is being bonded in covalent bonding

Answer 12

two non metals

Question 13

what is being bonded in ionic bonding

Answer 13

a metal and a non metal

Question 14

what is ionic bonding melting an boiling points

Answer 14

high

Question 15

what is ionic bonding solubility in water

Answer 15

some

Question 16

what is ionic bonding conductivity as a solid

Answer 16

no

Question 17

what is ionic bonding conductivity in a solution

Answer 17

yes

Question 18

what is giant covalent bonding conductivity in a solution

Answer 18

no

Question 19

what is covalent bonding conductivity in a solution

Answer 19

no

Question 20

what is metallic bonding conductivity in a solution

Answer 20

no

Question 21

what is giant covalent bonding conductivity as a solid

Answer 21

no,except graphite

Question 22

what is covalent bonding conductivity as a solid

Answer 22

no

Question 23

what is metalic bonding conductivity as a solid

Answer 23

it can

Question 24

what is giant covalent bonding melting an boiling points

Answer 24

high

Question 25

what is covalent bonding melting an boiling points

Answer 25

low

Question 26

what is metalic bonding melting an boiling points

Answer 26

high

Question 27

what is giant covalent bonding solubility in water

Answer 27

no

Question 28

what is covalent bonding solubility in water

Answer 28

no

Question 29

what is metallic bonding solubility in water

Answer 29

no

Question 30

what is the relative mass of a proton

Answer 30

1

Question 31

what is the relative mass of a neutron

Answer 31

1

Question 32

what is the relative charge of proton

Answer 32

+1

Question 33

what is the relative charge of a neutron

Answer 33

0

Question 34

what is the relative mass of a electron

Answer 34

1 ------- 2,000

Question 35

what is the relative charge of a electron

Answer 35

-1

Question 36

how to separate a insoluble solid and a liquid

Answer 36

filtration

Question 37

how to separate a souble solid and a liquid (when liquid not required)

Answer 37

evaportation

Question 38

how to separate a soluble solid and a liquid(when liquid is required)

Answer 38

simple distillation

Question 39

how to separate immisicble liquids

Answer 39

seperating funnel

Question 40

how to seperare misicble lquids(with diffrent boiling points)

Answer 40

fractal distillation

Question 41

how to separate miscible liquids (on the basis of solubility)

Answer 41

paper cromatogrphy

Question 42

what is the relation in oxygen particles between sulfate and sulfite

Answer 42

sulfate will always have one more oxygen particle then sulfite (sulfate usually is 3 oxygen sulfide is usually 2 oxygen)

Question 43

what will the suffix be on the ion if it is monotomic

Answer 43

-ide

Question 44

what 2 metals do brass contain

Answer 44

zinc and copper

Question 45

why are alloies stronger than pure metals

Answer 45

the different sizes of atoms in the metals mean that the atoms are no longer aligned in rows and will no longer slide over one another

Question 46

what does electrolysis mean/do

Answer 46

splits up ionic molecules with electricty

Question 47

what is the negative pole called in an electrolysis experiment

Answer 47

cathode

Question 48

what is the postive pole called in an electrolysis experiment

Answer 48

anode

Question 49

what happens to the metals in electrolysis reactions

Answer 49

They gain electrons and form a solid layer on the bottom of the solution

Question 50

what happens to the non-metals in electrolysis reactions

Answer 50

they lose electrons and become gasses and bubble