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Chemistry Practical class XI, XII (11,12)
4. TO STANDARDISE THE BENCH SULPHURIC ACID AGAINST THE STANDARD ALKALI (NAOH) SUPPLIED, AND TO EXPRESS THE CONCENTRATION IN :
A) NORMALITY B) GM/LITRE C) MOLARITY AND D) PERCENTAGE THEORY: Reaction H₂SO4 + 2NaOH —--->Na₂SO4+ 2H₂O Ionically, 2H+ + 20H- —----> 2H₂O Bench acids…
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32. TO SHOW THE PRESENCE OF CARBON DIOXIDE IN AIR.
THEORY: The presence of carbon dioxide in air can be shown by its action on lime water. Carbon dioxide turns…
31. TO SHOW THE PRESENCE OF WATER VAPOUR IN AIR.
METHOD 1 THEORY: The presence of moisture or water vapour in air can be readily shown by the behavior of…
30. TO SEPARATE THE COMPONENTS OF A MIXTURE OF TWO INSOLUBLE SOLIDS. (ONE BEING SOLUBLE IN DIL ACID)
THEORY: Suppose the given mixture contains calcium carbonate and sand. Both are insoluble in water. But calcium carbonate is, however,…
29. TO MIX THE TWO GIVEN SOLUTIONS, AND TO SEPARATE THE PRECIPITATE IN PURE AND DRY STATE
THEORY: Precipitation is a double decomposition reaction (also called metathesis) usually between two clear solutions, resulting in the formation of…
