Question | Answer |
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. |