C6, CHEMISTRY OCR GATEWAY

?
WHAT IS ELECTROLYSIS?
FLOW OF CHARGE BY MOVING ELECTRONS
1 of 41
WHAT CHARGE DOES THE CATHODE HAVE?
NEGATIVE CHARGE
2 of 41
WHAT POWER SUPPLY IS USED IN ELECTROLYSIS?
DIRECT CURRENT
3 of 41
WHAT WOULD HAPPEN IF AN ELECTROLYTE SOLIDIFIES?
THE IONS ARE FIXED-THEREFORE NO MOVEMENT OF ELECTRONS= NO CURRENT
4 of 41
WHAT DO FUEL CELLS DO?
CONVERT HEAT ENERGY INTO ELECTRICAL ENERGY
5 of 41
WHAT IS THE EQUATION FOR HYDROGEN AND OXYGEN FUELL CELL?
2H2+02=2H2O
6 of 41
WHY ARE FUEL CELLS BEING USED IN THE CAR INDUSTRY?
NO CO2 PRODUCED, ALTERNATIVE FOR FOSSIL FUELS, WATER(PRODUCT) IS NOT A POLLUTANT
7 of 41
WHAT IS THE DISADVANTGE OF HYDROGEN AND OXYGEN FUEL CELLS?
FOSSIL FUELS NEED TO BE BURNT TO PRODUCE HYROGEN AND OXYGEN
8 of 41
WHAT HAPPENS IN A DISPLACEMENT REACTION?
THE MORE REACTIVE METAL REPLACES THE LESS REACTIVE METAL
9 of 41
WHAT IS THE MOLECULAR FORMULA FOR ETHANOL?
C2H5OH
10 of 41
WHAT PROCESS IS ETHANOL MADE BY?
FERMENTATION
11 of 41
WHAT IS THE WORD EQUATION TO MAKE ETHANOL?
GLUCOSE=ETHANOL + WATER
12 of 41
WHAT DOES A DETERGENT MOLECULE DO?
LIFTS THE GREASE STAIN OFF INTO THE WATER
13 of 41
WHAT TYPE OF MOLECULE IS A DETERGENT MOLECULE?
AN EMULSIFIER
14 of 41
EXPLAIN HOW GREASE IS REMOVED
HYDROPHOBIC END BONDS WITH GREASE, HYDROPHILLIC HEAD BONDS WITH WATER, AS MORE DETERGENT MOLECULES COME=STRONGER INTERMOLECULAR BONDS, LIFT GREASE
15 of 41
WHAT IS THE GENERAL FORMULA FOR ALCOHOLS?
CNH2N+1OH
16 of 41
WHAT HAPPENS IF THE TEMPERATURES ARE LOW DURING FERMENTATION?
ENZYMES IN THE YEAST BECOME INACTIVE, SO SLOW/NO REACTION
17 of 41
WHAT IS PRODUCED IF OXYGEN IN PRESENT IN FERMENTATION?
ETHANOIC ACID
18 of 41
WHAT MAKES CFC MOLECULES BREAK DOWN?
UV RADIATION FROM THE SUN
19 of 41
WHAT IS A SINGLE CHLORINE ATOM CALLED?
CHLORINE RADICALS
20 of 41
WHAT HAPPENDS WHEN THE CHLORINE ATOM REACTS WITH THE OZONE MOLECULES?
TURNS OZONE INTO OXYGEN GAS, DEPLETION OF OZONE LAYER
21 of 41
WHAT IS OZONES MOLECULAR FORMULA?
O3
22 of 41
WHAT IS ANOTHER PROBLEM WITH CHLORINE RADICALS?
THEY TAKE A VERY LONG TIME TO BREAK DOWN
23 of 41
WHY ARE HFCS BETTER?
THEY DO NOT CONTAIN CHLORINE, SO DO NOT DEPLET THE OZONE
24 of 41
WHAT ARE THE ALTERNATIVES TO CFCS?
ALKANES, HFCS(HYDROFLUROCARBONS)
25 of 41
WHAT IS THE TYPE OF REACTION THAT MAKES ETHENE TO ETHANOL?
A HYDRATION REACTION
26 of 41
WHAT IS THE NAME OF THE REACTION WHERE BOTH ELECTRONS ARE GAINED AND LOST?
REDOX REACTION
27 of 41
WHAT IS THE WORD EQUATION FOR RUSTING?
IRON+WATER+OXYGEN=HYDRATED IRON (III) OXIDE
28 of 41
WHY IS ZINC USED AS A SACRIFICAL METAL FOR IRON?
BECAUSE IT IS MORE REACTIVE AND THEREFORE WILL PROTECT IRON FROM RUSTING
29 of 41
WHAT IS OXIDATION?
A SUBSTANCE WHERE ELECTRONS ARE LOST, OXIDISED SUBSTANCE= +VE CHARGE
30 of 41
WHAT IS REDUCTION?
A SUBSTANCE WHERE ELECTRONS ARE GAINED= -VE CHARGE
31 of 41
A DISADVANTAGE OF MAKING ETHANOL BY FERMENTATION?
LOW YIELD, FRACTIONAL DISTILLATOIN IS NEED FOR PURIFYING
32 of 41
A DISADVANTAGE OF HAVING ETHANOL BY HYDRATION?
NOT SUSTAINABLE MADE FROM FINITE RESOURCES, NEEDS CATALYST SO LOTS OF ENERGY
33 of 41
WHAT DOES POLYUNSATURATED MEAN?
CONTAIN MORE THAN ONE DOUBLE CARBON BOND
34 of 41
WHAT IS IT CALLED WHEN YOU SPLIT UP OILS WITH ALKALIS?
SAPONICATION
35 of 41
WHAT DOES FAT AND SODIUM HYDROXIDE MAKE?
SOAP + GLYCEROL
36 of 41
WHAT GROUP ARE FATS AND OILS IN?
ESTERS
37 of 41
WHAT IS IT CALLED WHEN CARBON ATOMS ARE ALL LINKED BY SINGLE BONDS?
SATURATED
38 of 41
HOW DO YOU TEST FOR UNSATURATION IN OILS?
TEST IN BROMINE WATER
39 of 41
WHAT HAPPENS IF IT IS UNSATURATED, WHAT COLOUR DOES THE BROMINE WATER TURN?
COLOURLESS
40 of 41
HOW DO YOU REMOVE PERMANENT HARDNESS?
ION EXCHANGE RESIN
41 of 41

Other cards in this set

Card 2

Front

NEGATIVE CHARGE

Back

WHAT CHARGE DOES THE CATHODE HAVE?

Card 3

Front

DIRECT CURRENT

Back

Preview of the back of card 3

Card 4

Front

THE IONS ARE FIXED-THEREFORE NO MOVEMENT OF ELECTRONS= NO CURRENT

Back

Preview of the back of card 4

Card 5

Front

CONVERT HEAT ENERGY INTO ELECTRICAL ENERGY

Back

Preview of the back of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Biofuels and Biogases, Electrolysis, Ozone, Fuel Cells resources »