BRONZE = COPPER + TIN
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Transcript of BRONZE = COPPER + TIN
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BRONZE = COPPER + TIN
STATUES AND ORNAMENTS
CARBON DIOXIDE
TURNS BLUE LITMUS RED, WHICH MEANS IT IS AN ACID
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THE WATER CONTAINS CALCIUM SALTS WHICH TURN INTO LIMESCALE WHEN HEATED. THIS STICKS TO THE PIPE.
LIMESTONE
Ca, Mg, Zn, Cu
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IONIC BOND
ONE ATOM TRANSFERS ELECTRONS TO ANOTHER CREATING + AND – IONS WHICH ATTRACT EACH OTHER
ORANGE JUICE, VINEGAR, SOUR MILK, COLA, RAIN
TOOTHPASTE, BREAD SODA, MILK OF MAGNESIAWASHING SODA
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CARBON NITROGEN
TO STOP THE INK SEEPING INTO THE WATER BELOW IT
THE INK IS SOLUBLE IN THE WATER AND TRAVELS UP THE PAPER WITH IT.
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THERE IS AN INCREASE IN THE ENERGY OF THE GAS MOLECULES AND THEY LEAVE THE SOLUTION.
160
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CO2 H2O
WATER EVAPORATION DIFFERS FROM PLACE TO PLACE
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AIR IS DRAWN THROUGH THE LIMEWATER .
THE LIMEWATER GOES MILKY WHITE
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THE LIQUID WILL TURN BLUE COBALT CHLORIDE TO PINK
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SETTLEMENT TANKS
ALLOWS SOLIDS AND SUSPENDED PARTICLES TO SETTLE TO THE BOTTOM OF THE TANKS.
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FILTRATION
WATER IS FILTERED THROUGH BEDS OF SAND TO REMOVE SUSPENDED PARTICLES
CHLORINATION
CHLORINE IS ADDED TO KILL HARMFUL BACTERIA IN THE WATER
FLUORIDATION
PREVENTS TOOTH DECAY
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WEAR PROTECTIVE GEAR WHEN DOIG CHEMISTRY EXPERIMENTS
ONLY USE EQUIPMENT WHEN TOLD TO BY YOUR TEACHER.
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ADD POTASSIUM METAL TO A BASIN OF WATER. THE POTASSIUM WILL FLOAT ON THE WATER AND REACT SO VIOLENTLY THAT IT WILL CATCH FIRE. A FIZZING NOISE WILL BE HEARD AS HYDROGEN GAS IS PRODUCED.
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ALKALI METALS
THEY REACT WITH OXYGEN TO FORM OXIDES
TOUCH A PIECE OF UNIVERSAL
INDICATOR PAPER AGAINST THE
LEMON. COMPARE THE COLOUR TO PH CHART.
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ATOMS OF THE SAME ELEMENT WHICH HAVE
DIFFERENT NUMBERS OF NEUTRONS
PAINTING, OILING OR GREASING
OXYGEN OR WATER
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ADD MORE COPPER SULPHATE AND STIR TO DISSOLVE
NO MORE COPPER SULPHATE WILL DISSOLVE IN THE SOLUTION
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MANGANESE DIOXIDE
HYDROGEN PEROXIDE DECOMPOSING TO GIVE OXYGEN GAS
CaCl2 + H2O + CO2
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PLASTIC WASTE IS UNSIGHTLY IN THE ENVIRONMENT
PLASTIC WASTE IS EXPENSIVE TO DISPOSE OF.
CANNOT BE BROKEN DOWN BY MICRO-ORGANISMS
MADE FROM RENEWABLE MATERIALS
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WATER
IT WOULD TURN BLUE COBALT CHLORIDE TO PINK
LIMEWATER
CARBON DIOXIDE FROM THE BURNING WAX TURNS IT MILKY WHITE
COAL
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AN ELEMENT IS A SUBSTANCE WHICH CANNOT BE BROKEN INTO ANYTHING SIMPLER BY CHEMICAL MEANS.A COMPOUND IS TWO OR MORE ELEMENTS WHICH ARE CHEMICALLY COMBINED
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METALS NON-METALS
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MAGNESIUM IS NOW CHEMICALLY COMBINED WITH OXYGEN
FROM OXYGEN IN THE AIR
MAGNESIUM OXIDE, MgO
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TWO OR MORE ATOMS CHEMICALLY COMBINED
COVALENT BONDING
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THE FORCE OF ATTRACTION BETWEEN OPPOSITELY CHARGED IONS IN A COMPOUND IS CALLED AN IONIC BOND .
SODIUM CHLORIDE
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SHAKE THE WATER SAMPLE WITH SOAP FLAKES. THE HARD WATER REQUIRES A LOT OF SOAP TO PRODUCE A LATHER.
CALCIUM HYDROGEN CARBONATE
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SOFT.THE RESIN WILL HAVE REMOVED ALL OF THE IONS WHICH CAUSE HARDNESS.
TEST THE WATER SAMPLE WITH SOAP FLAKES. IT WILL REQUIRE VERY LITTLE SOAP TO PRODUCE A LATHER.
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CONDUCTS ELECTRICITY, MgO DOES NOT
Mg IS MALLEABLE, MgO IS NOT
DISSOLVES THE LIMESTONE
ACIDS IN RAIN REACT WITH THE LIMESTONE
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SAND
SALT OR WATER
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SOFT
HARDNESS LEFT IN TEST TUBE A
CHLORINATION
FILTRATION
HEAT
ELECTRIC
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TUBE A
TO REMOVE OXYGEN FROM WATER
TO PREVENT OXYGEN GETTING BACK INTO TUBE
OXYGEN NEEDED FOR RUSTING
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18
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LEAVE TO COOL
CRYSTALS WILL FORM
FILTER THE CRYSTALS
Solution of copper sulphate
Crystals forming
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A SCALE FROM 0 TO 14 USED TO MEASURE THE
DEGREE OF ACIDITY
USING A PH METER
GASTRIC JUICE
BLOOD
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ELECTROLYSIS
TO IMPROVE ITS
CONDUCTIVITY
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OXYGEN
RELIGHTS A GLOWING SPLINT
HYDROGEN
BURNS WITH A LOUD POP
2 HYDROGEN AND 1 OXYGEN
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HYDROGEN
HYDROCHLORIC ACID
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CALCIUM
COPPER
CALCIUM, MAGNESIUM, ZINC, COPPER
WEAR GOGGLES
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SULPHUR DIOXIDE
CAUSES ACID RAIN
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NO DEFINITE SHAPE
LIQUIDS HAVE A DEFINITE VOLUME
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BUNSEN BURNER/ CRUCIBLE
TRIPOD STAND/ CLAY TRIANGLE
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Conical flask
Filter funnel
Filter paper
Beaker of dirty water
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13 – 6 = 7
ISOTOPES
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MEASURING THE VOLUME OF ACID
NEEDED FOR NEUTRALISATION
A SALT AND WATER ARE FORMED
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REFRIDGERATION
FIRE EXTINGUISHERS
BURNS WITH A LOUD POP
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Zn + 2HCl →ZnCl2 + H2
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HYDROGEN PEROXIDE
MANGANESE DIOXIDE
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A CHEMICAL WHICH SPEEDS UP A REACTION WITHOUT BEING USED UP ITSELF.
RESULT;RED LITMUS DID NOT CHANGE,
BLUE LITMUS TURNED RED
CONCLUSION: CARBON DIOXIDE IS AN ACID
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DOES NOT FORM SUDS WITH SOAP
CALCIUM
HARD TO FORM SUDS WHEN WASHING
BLOCKS HOT WATER PIPES
BLOCKS HEATING ELEMENTS
PROVIDES CALCIUM FOR BONES
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DISTILLATION
LIEBIG CONDENSER
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B
TASTE IT
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COVALENT
ATOMS SHARE ELECTRONS
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CARBON DIOXIDE
SODIUM LOSES AN ELECTRON
CHLORINE GAINS AN ELECTRON
ELECTROSTATIC ATTRACTION
Potassium chloride
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AN ALLOY IS A MIXTURE OF METALS
BRASS
IS USED FOR ORNAMENTAL PURPOSES, DOOR HANDLES ETC.
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HYDROCHLORIC ACID
CALCIUM CARBONATE
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CALCIUM, MAGNESIUM, ZINC, COPPER
ELECTRON (-1), PROTON (+1)
ELECTRON (1/1840 AMU), PROTON (1AMU)
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SAFETY GLASSES
PERSPEX SHEET
PAINTING, OILING, GREASING, ELECTROPLATING
KEEPS OXYGEN AND WATER AWAY FROM THE METAL
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A FUEL MADE FROM DECAYED ANIMALS AND PLANTS
METHANE
WHITE
RED TURNS BLUE
MgO IS A BASE
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3.6 mg/ 100g water
It reduces the solubility of oxygen in the water
RISING TEMPERATURES WILL REDUCE
THE AMOUNT OF DISSOLVED OXYGEN IN THE WATER
THIS WILL REDUCE THE NUMBERS OF ANIMALS
AND PLANTS LIVING IN THE OCEANS AND RIVERS.
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THE NUMBER OF PROTONS IN THE NUCLEUS OF AN ATOM.
ISOTOPES ARE ATOMS WHICH DIFFER ONLY BY THE NUMBER
OF NEUTRONS IN THE NUCLEUS
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ALKALINE EARTH METALS
BECAUSE THEY HAVE EIGHT ELECTRONS
ON THEIR OUTER SHELL
AN IONIC BOND IS THE FORCE OF ATTRACTION
BETWEEN OPPOSITELY CHARGED IONS IN A COMPOUND.
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TABLE SALT AND COPPER SULPHATE
THEY CONDUCT ELECTRICITY
SO THAT THEY CAN BE FREE TO MOVE ABOUT AND
CARRY CHARGE
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LEMON JUICE, SODA WATER
TOOTHPASTE, LIMEWATER
PURE WATER
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Water
Chromatography paper
Test Tube
The water soaks up along the paper and carries the ink with it. As it does the different colours in the ink separate out because they travel at different speeds up the paper
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THE INK FROM THE MARKER WITH A MIXTURE OF COLOURS WILL
HAVE SEPARATED INTO A ITS DIFFERENT COLOURS.
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CRUDE OIL
THEY CANNOT BE BROKEN DOWN BY
LIVING THINGS
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GRADUATED CYLINDER
PIPETTE OR BURETTE
FLOAT ON WATER CUT EASILY WITH A KNIFE
REACT VIOLENT WITH WATER
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A BOND WHERE THE ELECTRONS ARE SHARED BETWEEN THE ATOMS IS CALLED A COVALENT BOND.
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SODIUM CHLORIDE
CRYSTALLINE SOLIDS HAVE HIGH BOILING POINTS
CRYSTALLINE SOLIDS HAVE REGULAR SHAPES
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NaOH
SODIUM HYDROXIDE (NaOH)
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LIEBIG CONDENSER
X
PURE WATER
SALT
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A CONCENTRATED SOLUTION CONTAINS A LOT OF SOLUTE
DISSOLVED IN THE SOLVENT.
A DILUTE SOLUTION CONTAINS A SMALL AMOUNT OF SOLUTE
DISSOLVED IN SOLUTE.
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0 10 20 30 70 80 10020
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0 10 20 30 70 80 10020
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60 DEGREES
THE SOLUBILITY INCREASES AS THE TEMPERATURE
INCREASES
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IS A SUBSTANCE WHICH CANNOT BE
BROKEN INTO ANYTHING SIMPLER BY CHEMICAL MEANS
TWO OR MORE ELEMENTS WHICH ARE CHEMICALLY
COMBINED.
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We placed small pieces of universal indicator paper on a white tile and put a drop of each of the solutions being tested, in turn, on each of the test papers. We
noted the colour change and find the pH from the colour chart.
ORANGE JUICE VINEGAR
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HCl
CALCIUM CARBONATE
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MORE DENSE THAN AIR
NO EFFECT ON THE RED LITMUS
TURNS BLUE LITMUS RED
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REFRIDGERATION
FIRE EXTINGUISHERS
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PLACE EQUAL VOLUMES OF A & B IN
TWO TEST TUBES. ADD TWO DROPS OF
SOAP SOLUTION TO BOTH AND SHAKE.
SEE WHICH FORMS PERMANENT SUDS.
‘A’ WONT FORM SUDS ‘B’ WILL FORM SUDS EASILY
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CALCIUM IONS CALCIUM SALTS
SETTLING FILTRATION CHLORINATION
FLUORIDATION
FILTRATION TAKES OUT ALL VISIBLE DIRT
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Atoms of the same element which have
different numbers of neutrons.
Hydrogen peroxide and manganese dioxide
Manganese dioxide
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Sulphur dioxide
It reacts with it causing it to wear away.
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Use the same volume/strength of acid each time.
CALCIUM, magnesium, zinc, copper
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2, 8, 8, 1
CaCO3 + H2O
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To increase the conductivity of the
water.
Burns with a loud pop
There are 2 H atoms for every O atom in water
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Burette Pipette
Release the acid from the burette, using the tap, into the base in the conical flask. Continue until the indicator in the conical flask changes colour. The volume of acidreleased can be read from the side of the burette. This is the volume required to neutralise the base.
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Hydrochloric acid Sodium hydroxide
HCl + NaOH → NaCl + H2O
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It moves up the paper with the water and the colours separate from each other.
The spot will move with the water level and show no separation
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They need a container with a lid to contain them.They do not flow
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The gas will take up more space when hot
The oxygen is used up. This causes the decrease. Remains Steady because no more oxygen left.
Nitrogen
No proper measurement markings on the bell jar.
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any one from: beryllium/ magnesium/ calcium/ strontium/ barium/ radium
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change of colour/ becomes flakey change of texture/ becomes softer looses strength tarnish/ rust
(i) calcium chloride/ drying agent labelled/ clearly named in text (ii) boiled (de-gassed) water/ water with no air labelled/ clearly named in text oil labelled/ clearly named in text stoppers not required [no diagram/s deduct 3 or 6 marks]
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