WATER TITRATIONS

NAME THE 2 WATER TITRATIONS

TOTAL HARDNESS OF WATER , DISSOLVED OXYGEN IN WATER

THE DISSOLVED OXYGEN TITRATION CAN ALSO BE KNOWN AS

THE WRINKLER METHOD

WHAT ARE YOU MEASURING DURING THE TOTAL HARDNESS OF WATER TITRATION

THE CONCENTRATION OF CA AND MG

NAME THE THREE SUBSTANCES USED IN THE TOTAL HARDNESS OF WATER TITRATION

WATER , pH BUFFER , EDTA

WHAT INDICATOR AND COLOUR CHANGED WAS USED IN THE TOTAL HARDNESS OF WATER EXPERIMENT

ERICHROME BLACK T , WINE RED TO BLUE

WHAT HOMOGULOUS SERIS IS EDTA APART OF

CARBOXYLIC ACIDS

WHAT pH BUFFER USED IN THE TOTAL HARDNESS OF WATER TITRATION

pH 10

WHY IS SULFURIC ACID ADDED TO THE DISSOLVED OXYGEN TITRATION

TO LIBERATE IODINE

WHAT COLOUR CHANGE INDICATED THE END POINT OF THE DISSOLVED OXYGEN TITRATION

BLUE/BLACK TO COLOURLESS

WHAT COMPOUND IS USUALLY ADDED TO WATER TO PROVIDE Mn IONS

MnSO4/ MANGANESE SULFATE

WHY WAS EXCESS MANGANESE SULFATE NEEDED IN THE DISSOLVED OXYGEN TITRATION

TO ENSURE ALL O2 IS DETECTED

WHAT COLOUR IS THE PRECIPITATE FORMED BY MN IONS

BROWN

WHAT INDICATOR AND COLOUR CHANGE WAS USED DURING THE DISSOLVED OXYGEN TITRATION

STARCH , BLUE/BLACK TO COLOURLESS

WHY IS IT IMPORTANT TO MAINTAIN THE pH OF 10 DURING THE TOTAL HARDNESS OF WATER TITRATION

TO ENSURE A SHARP END POINT

WHAT WAS OBSERVED IN THE CONICAL FLASK WHEN SULFURIC ACID WAS ADDED DURING THE TOTAL HARDNESS OF WATER TITRATION

PRECIPITATE DISSOLVES

WHAT COLOUR CHANGE WAS OBSERVED UP TO THE POINT WHERE THE INDICATOR WAS ADDED DURING THE DISSOLVED OXYGEN TITRATION

BROWN/RED FADES TO PALE YELLOW

WHAT COLOUR CHANGE WAS OBSERVED AT THE END POINT OF THE DISSOLVED OXYGEN TITRATION

BLUE/BLACK TO COLOURLESS

IDENTIFY A COMPOUND OF CALCIUM THAT IS ONE OF THE MAIN CAUSES OF TOTAL HARDNESS IN WATER

CALCIUM SULFATES

WHAT COLOUR WAS OBSERVED USING ERICHROME BLACK T IN THE PRESENCE OF Mn

WINE/RED

WHAT COLOUR WAS OBSERVED AT THE END OF THE TOTAL HARDNESS TITRATION IN THE PRESENCE OF ERICHROME BLACK T

BLUE

WHAT CONCLUSSION SHOULDVE BEEN DRAWN HAD A WHITE PRECIPITATE FORMED IN THE DISSOLVED OXYGEN TITRATION INSTEAD OF BROWN

THERE WAS NO DISSOLVED OXYGEN

WHAT DOES EDTA STAND FOR

ETHYLENEDIAMINETETRAACETIC ACID