OXIDATION NO/4
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| MUST ENSURE THAT THE BUNSEN | IS SAME AND DISTANCE BETWEEN THE BUNSEN AND THAT HARD GLASS TEST TUBE IS THE SAME IN ALL.
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| THE GROUP 2 CARBONATES THAT IN HEATING FILLS THE TEST TUBE | THE FASTEST IS THE ONE EASIEST TO DECOMPOSE.
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| WHAT MUSST YOU ENSURE IN TEST FOR THERMAL STABILITY EXPERIEMENTS ?... | MUST ENSURE THAT THE BUNSEN IS SAME AND DISTANCE BETWEEN THE BUNSEN AND THAT HARD GLASS TEST TUBE IS THE SAME IN ALL
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| THE GROUP 2 CARBONATES THAT IN HEATING FILLS THE TEST TUBE THE FASTEST .... | IS THE ONE EASIEST TO DECOMPOSE.
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| AS A CONTROL .. | .SOME GAS WILL BE COLLECTED OVER THE WATER BATH.
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| GROUP 2 CHLORIDES CAN BE PREPARED BY ... | DIRECT SYNTHESIS THE METAL AND CHLORIDE ARE HEATED TOGETHER E.G. CA+ CL2 à CACL2
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| WHAT IS DIRECT SYNTHESIS ... | THE METAL AND CHLORIDE ARE HEATED TOGETHER E.G. CA+ CL2 à CACL2
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| DILUTE HCL WARMED WITH GROUP 2 OXIDE WHAT IS PRODUCED... | METAL CHLORIDES AND WATER PRODUCED MGO+2HCL à MGCL2 +H2O
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| WHAT REACTION IS DILUTE HCL WARMED WITH GROUP 2 OXIDE... | NEUTRALISATION REACTION
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| THE CHLORIDE CAN BE PRODUCED BY... | NEUTRALISING THE ACID WITH A CARBONATE. CACO3 (S) +2HCL(AQ) àCACL2(AQ) +H20(L)+CO2(G).
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| CHLORIDE PRODUCED WHEN .. | BASE AND ACID HCL REACTED. PRODUCE SALT WATER AND C02.
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| WHEN NEUTRALISE A CARBONATE ALWAYS ADD ... | C02 AS PRODUCT.
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| ALL GROUP 2 CHLORIDE ARE SOLUABLE INSOLUABLE? ... | SOLUABLE IN WATER
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| BERYLLIUM CHLORIDE BECL2 IS ... | COVALENT SOLUBLE ALSO IN ORGANIC SOLVENTS. THERE ARE 2 PAIRS OF ELECTRONS AND NO LONE PAIRS AROUND THE BERYLLIUM ATOM. THE 2 ELECTRON PAIRS REPEL TO GIVE MAXIMUM SEPARATION AND SO THE GASEOUS MOLECULE IS LINEAR.
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| IN A LINEAR COMPOUN THE ELECTRON PAIRS REPEL TO A ... | MAXIUMUM SEPERATION , 180.
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| THE OTHER GRP2 CHLORIDES IONIC COVALENT .. | ARE IONIC ALTHOUGH MGCL HAS SOME COVALENT CHARACTER.
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| WHAT 2 GP2 CHLORIDES HAVE COVALENCY ... | BERYLIUM CHLORIDE AND MGCL.
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| THE TENDENCY TO FORM HYDRATED CHLORIDE DECREASE INCREASE DOWN GROUP GROUP 2?... | DECRASES DOWN THE GROUP
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| MAGNESIUM AND CACL FORM HYDRATED .... | SOLID WITH 6 MOLECULES OF WATER OF CRYSTALLISATION E.G. MGCL2.6H20.
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| WHEN HEATED THESES HYDRATED SOLID COMPOUNDS DECOMPOSE COZ ... | THE CHLORIDE IONS DEPROTONATE WATER MOLECULES. HCL GAS PRODUCED. MGCL2.6H2O(S) à MG(OH)2(S) +4H2O(G) + 2HCL(G).
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| MOVING DOWN GROP2 FROM BERYLLIUM TO BARIUM , THE TREND IS FOR .... | TO DECREASE: MELTING TEMP, POLARISING POWER, IONISATION ENERGY.
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| WHT THINGS INCREASE DOWN GRP2 ... | ATOMIC AND IONIC RADII, REACTIVITY OF A METAL, THERMAL STABILITY.
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| FOR THERMAL SATBILITY TO INCREASE DOWN A GROUP IT MEANS ... | COMPOUND BECOMES MORE STABLE THE CATION POLARISES ANION LESS DUE TO LARGER RADII OR LOWER CHARGE DENSITY.
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| IF ONE CONCENTRATION NONE A TITRATION IS TO DETERMINE ... | UNKNOWN CONCENTRATION.
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| EXPERIMENTS TO STUDY THERMAL DECOMPOSITION ... | PLACE THE SAME AMOUNT OF EACH CARBONATE OF NITRATE IN SERIES OF CHARGE GLASS TEST TUBES.
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| EXPERIMENTS TO STUDY THERMAL DECOMPOSITION ... | 2. FIX A DELIVERY TUBE ON THE TEST TUBE AND CLAMP IN A STAND. 3. LINK A BUNSEN BURNER & MEASURE TIME TAKEN FOR A GAS EVOLVED TO REACH A MARK ON THE TEST TUBE IN WATER BATH. REPEAT WITH SAME AMOUNT IN MOLES OF REMAINING CARBONATES.
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