CHAP 7 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| HALOGENS AND IODINE TITRATION: HALOGEN REACT WITH METALS ... | TO FORM SALTS. ASTATINE IS A RADIOACTIVE ELEMENTS OF HALF LIFE 8.3 HOURS.
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| AT ROOM TEMP AND PRESSURE CL- AND F- GASES LIQUID? ... | ARE GASES. S
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| AT ROOM TEMP WHAT IS BROMINE STANDARD STATE A ... | VOLATILE LIQUID,
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| IODINE STANDARD STATE IS... | A SOLID THAT SUBLIMES ON HEATING.
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| COLOUR OF IODINE IS .... | DARK GREY FORMS A VIOLET VAPOUR.
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| COLOUR OF BROMINE IS ... | A BROWN LIQUID.
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| COLOUR OF CHLORINE IS ... | A GREENISH GAS.
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| COLOUR OF FLUORINE IS ... | A PALE YELLOW GAS.
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| 1ST I.E. OF HALOGEN ... | DECREASES DOWN THE GROUP. NUCLEAR CHARGE INCREASES. EFFECTIVE NUCLEAR CHARGE REMAINS SAME.
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| THE ATOMIC RADIUS OF GR 7 .. | INCREASES AS NEW SHELLS OUTERMOST ELECTIONS LESS STRONGLY HELD. SO FROM FLUORINE TO 1ST I.E. DECREASES.
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| ELEMENT GAINS AN ELECTRON... | ENERGY IS RELEASED
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| ELECTRON AFFINITY OF GRR7 . | .. DECREASES DOWN THE GROUP
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| WHY ELECTRON AFFINITY OF GRR7 DECREASE DOWN THE GROUP.. | COZ ELECTRONS NOT AS CLOSE TO NUCLEUS IN LARGE ATOMS THAN IN SMALLER.
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| WHEN A LARGE ATOM GAINS AN ELECTRON ... | LESS ENERGY IS RELEASED THAN A SMALLER.
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| WHY CHLORINE RELEASE LESS ENERGY ANOMALOUS WHEN GAIN ELECTRONS ... | SO SMALL REPULSION BETWEEN THE 7 OTHER ELECTRONS AND THE 1 ELECTRON REDUCES THE ENERGY DUE TO THE ATTRACTION TO THE POSITIVE NUCLEUS OF THE 1 ELECTRON.
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| IN CL TAKES LESS ENRGY TO REMOVE ELECTRON COZ... | SO SMALL AND OTHER ELCTRONS REPEL ONE ELECTRON.
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| CHLORINE AND BROMINE ARE SOLUBLE /INSOLUABLE?.. | SOLUABLE IN WATER
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| WHY ARE CHLORINE AND BROMINE SOLUABLE IN WATER? .. | THEY REACT REVERSIBLE WITH WATER & FORM A MIXTURE OF ACIDS : CL2 + H2OàHCL + HOCL.
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| AQUEOUS SOLUTIONS CHLORINE AND BROMINE CALLED ... | BR AND CL WATER.
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| COLOUR OF BR WATER & CL WATER IS ... | BROWN RED CHLORINE WATER IS PALE GREEN.
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| IODINE SOLUBLE OR INSOLUABLE IN H2O? | SLIGHTLY SOLUBLE IN H20
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| COLOUR OF IODINE FORMS... | PALE BROWN UNLESS KI – WHICH CAUSES DEEP BROWN RED DUE TO I3- ION. I2(AQ) + I-(AQ) àI3-(AQ).
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| WHY IS KI DEEP BROWN RED ... | DUE TO I3- ION. I2(AQ) + I-(AQ) àI3-(AQ).
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| ALL HALOGENS MORE SOLUBLE IN ... | INERT ORGANIC SOLVENTS SUCH AS TETRACHLORIDE OR HEXANE THAN WATER.
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| 2 EXAMPLES OF ORGANIC SOLVENTS THAT HALOGENS MORE SOLUBLE IN... | TETRACHLORIDE OR HEXANE
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ufuoma
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