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OXIDATION NO/4

QuestionAnswer
MUST ENSURE THAT THE BUNSEN IS SAME AND DISTANCE BETWEEN THE BUNSEN AND THAT HARD GLASS TEST TUBE IS THE SAME IN ALL.
THE GROUP 2 CARBONATES THAT IN HEATING FILLS THE TEST TUBE THE FASTEST IS THE ONE EASIEST TO DECOMPOSE.
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
THE GROUP 2 CARBONATES THAT IN HEATING FILLS THE TEST TUBE THE FASTEST .... IS THE ONE EASIEST TO DECOMPOSE.
AS A CONTROL .. .SOME GAS WILL BE COLLECTED OVER THE WATER BATH.
GROUP 2 CHLORIDES CAN BE PREPARED BY ... DIRECT SYNTHESIS THE METAL AND CHLORIDE ARE HEATED TOGETHER E.G. CA+ CL2 à CACL2
WHAT IS DIRECT SYNTHESIS ... THE METAL AND CHLORIDE ARE HEATED TOGETHER E.G. CA+ CL2 à CACL2
DILUTE HCL WARMED WITH GROUP 2 OXIDE WHAT IS PRODUCED... METAL CHLORIDES AND WATER PRODUCED MGO+2HCL à MGCL2 +H2O
WHAT REACTION IS DILUTE HCL WARMED WITH GROUP 2 OXIDE... NEUTRALISATION REACTION
THE CHLORIDE CAN BE PRODUCED BY... NEUTRALISING THE ACID WITH A CARBONATE. CACO3 (S) +2HCL(AQ) àCACL2(AQ) +H20(L)+CO2(G).
CHLORIDE PRODUCED WHEN .. BASE AND ACID HCL REACTED. PRODUCE SALT WATER AND C02.
WHEN NEUTRALISE A CARBONATE ALWAYS ADD ... C02 AS PRODUCT.
ALL GROUP 2 CHLORIDE ARE SOLUABLE INSOLUABLE? ... SOLUABLE IN WATER
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.
IN A LINEAR COMPOUN THE ELECTRON PAIRS REPEL TO A ... MAXIUMUM SEPERATION , 180.
THE OTHER GRP2 CHLORIDES IONIC COVALENT .. ARE IONIC ALTHOUGH MGCL HAS SOME COVALENT CHARACTER.
WHAT 2 GP2 CHLORIDES HAVE COVALENCY ... BERYLIUM CHLORIDE AND MGCL.
THE TENDENCY TO FORM HYDRATED CHLORIDE DECREASE INCREASE DOWN GROUP GROUP 2?... DECRASES DOWN THE GROUP
MAGNESIUM AND CACL FORM HYDRATED .... SOLID WITH 6 MOLECULES OF WATER OF CRYSTALLISATION E.G. MGCL2.6H20.
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).
MOVING DOWN GROP2 FROM BERYLLIUM TO BARIUM , THE TREND IS FOR .... TO DECREASE: MELTING TEMP, POLARISING POWER, IONISATION ENERGY.
WHT THINGS INCREASE DOWN GRP2 ... ATOMIC AND IONIC RADII, REACTIVITY OF A METAL, THERMAL STABILITY.
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.
IF ONE CONCENTRATION NONE A TITRATION IS TO DETERMINE ... UNKNOWN CONCENTRATION.
EXPERIMENTS TO STUDY THERMAL DECOMPOSITION ... PLACE THE SAME AMOUNT OF EACH CARBONATE OF NITRATE IN SERIES OF CHARGE GLASS TEST TUBES.
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.
Created by: ufuoma