Building Blocks 1b Int 2 1234 567 89 10 111213 14 1516171819.
Building Blocks 1d Int 2
-
Upload
destiny-mcgowan -
Category
Documents
-
view
25 -
download
1
description
Transcript of Building Blocks 1d Int 2
Building Blocks 1d Int 2
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15
22 23 24 25 26
16 17 18 19 20 21
27 28 29 30 31 32
Which elements are conductors of electricity?
Metals
and the non-metal carbon(graphite)
Which elements are non- conductors
of electricity?
Non metals except carbon(graphite)
Why are metals able to conduct electricity?
They contain free moving electrons
Which type of compounds (solid, liquid, solution) do not
conduct electricity?
Covalent compounds
(non metals atoms)
Why are covalent compounds unable to conduct electricity?
They are made up of molecules which are
uncharged.
They do not contain charged ions.
In which state will an ionic compound not conduct electricity?
solid
Why are ionic compounds able to conduct electricity when molten or in
solution?
They ions are free to move
Why do ionic compounds not conduct electricity when solid?
They ions are not free to move
A solid substance conducts electricity.
What type of substance is it?
Metal or carbon(graphite)(no compound conducts
when solid)
A substance does not conduct when solid but is able to conduct when
molten/solution. What type of substance is it?
Ionic
Metal/non-metal compound
A substance does not conduct electricity in any state.
What type of substance is it?
Covalent
A substance does not conduct electricity in any state and has a very high
melting/boiling point. What type of substance is it?
Covalent network
A substance does not conduct electricity in any state and has a low
melting/boiling point. What type of substance is it?
Covalent molecule
Are ionic compounds usually soluble or insoluble in water?
soluble
Are covalent compounds usually soluble or insoluble in water?
Insoluble
What is electrolysis?
The breaking up of an ionic compound using electricity.
What is an electric current?
A flow of electrons
A pupil passed electricity through copper chloride solution. What would be seen at
the negative electrode?
Brown solid/copper metal
- positive metal ions are attracted to the negative electrode.
Chlorine gas(bubbles of gas would be seen at the positive electrode -
chloride ions are negative.
A pupil passed electricity through copper chloride solution.
Write ion electron equations showing the formation of copper and the
formation of chlorine .?At negative electrode: Cu2+ + 2e- Cu
At positive electrode: 2Cl- Cl2 + 2e-
Why must a d.c supply be used in electrolysis?
So that the products can
be identified.
So only one product is collected/given off at an electrode.
Are electrons gained or lost at the negative electrode?
Positive metal ions
gain electrons.
Write the formula for the following-carbon monoxide, nitrogen dioxide,
sulphur trioxide, dinitrogen tetraoxide, carbon tetrachloride,
CO NO2 SO3
N2O4 CCl4
Write the formula for the followinglithium chloride, magnesium nitride, aluminium nitride, sodium sulphide
LiCl Mg3N2
AlN Na2S
Write the formula for the followingiron(II) oxide, copper(I) oxide,
Silver(I) chloride, iron(III)chloride
FeO Cu2O
AgCl FeCl3
Write the formula for the followingsodium sulphate, copper carbonate, magnesium hydroxide, ammonium
carbonate, calcium nitrateNa2SO4 CuCO3 Mg(OH)2
(NH4)2CO3 Ca(NO3)
Balance to following equationsC3H8 + O2 CO2 + H2O
Al + Cl2 AlCl3
CaCO3 + HCl CaCl2 + CO2 + H2O
C3H8 + 5 O2 3 CO2 + 4 H2O
2Al + 3Cl2 2AlCl3
CaCO3 + 2HCl CaCl2 + CO2 + H2O
Calculate the formula mass of the following
CH4 H2O Na2 SO4 Ca(NO3)2
CH4 12 + 4 =16H2O (2 x 1) + 16 = 18Na2 SO4 (2 x 23) + 32 + (4 x16) = 142 Ca(NO3)2 40 + (2 x 14) + (6 x 16) =164
Calculate one mole of the following
Cl2 CaCO3 CO2 Mg(OH)2
Cl2 2 x 35.5 = 71gCaCO3 40 + 12 + (3x16) = 100gCO2 12 + (2 x 16) = 44gMg(OH)2 24.5 + (2 x 16) + (2 x 1) = 58.5 g
Calculate the number of moles in the following88g CO2 10g CaCO3
10.1g KNO3 16g O2
1 mole CO2 = 12 + (2 x 16) = 44g 88/44 = 2 moles
1 mole CaCO3 = 40 + 12 + (3 x 16) = 100g 10/100 = 0.1 moles
1 mole KNO3 = 39 + 14 + (3 x 16) = 101g 10.1/101 = 0.1 moles
1 mole O2 = 2 x 16 = 32 g 16/32 = 0.5 moles
Calculate the mass of the following4 moles HCl 0.1 moles H2S
0.25 moles CaCO3 0.5 moles (NH4)2SO4
1mole HCl = 1 x 35.5 = 36.5g 4 moles = 4 x 36.6 = 146g
1mole of H2S = (2 x 1) + 32 = 34 g 0.1 moles = 0.1 x 34 = 3.4g
1 moles CaCO3 = 40 + 12 + (3 x 16) = 100g 0.25 moles = 0.25 x 100 = 25g
1 mole (NH4)2SO4 = (2 x 14) + (8 x 1) + 32 + (4 x 16) = 132g0.5 moles = 0.5 x 132 = 66g
Calculate the mass of carbon dioxide is produced when 4g of methane burns completely in oxygen.
CH4 + 2O2 CO2 + 2H2O
1 mole of CH4 produced 1 mole of CO2
if 16g gives 44g
then 4g gives 4/16 x 44 = 11g
( 4g is a 1/4 of 16g so a 1/4 of 44g is 11g)
Calculate the mass of water produced on burning 2.8g of ethene.
C2H4 + 3O2 2CO2 + 2H2O
1 moles of ethene C2H4 produced 2 moles water H2O
28g (1 mole) gives 36g (2 moles) 2.8g gives 2.8/28 x 36
= 3.6g
( 2.8g is a tenth of 28g so a tenth of 36g is 3.6g
Building Blocks 1d Int 2
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15
22 23 24 25 26
16 17 18 19 20 21
27 28 29 30 31 32