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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TO MIX THE TWO GIVEN SOLUTIONS, BARIUM CHLORIDE AND TO SEPARATE PRECIPITATE BARIUM SULPHATE IN PURE AND DRY STATE.
APPARATUS REQUIRED i) Beater ii) Porcelain Basin iii) Glass rod iv) wire gauze v) Test tube vi) Filter paper vii)…
35. TO PERFORM SOME CHEMICAL REACTIONS AND TO REPRESENT THEM IN BALANCED CHEMICAL EQUATIONS.
1. The more electropositive metals displace less electropositive metals from their compounds in aqueous solution. Take some dilute CuSO4 solution…
34. TO SEPARATE A MIXTURE OF DYES IN INK OR UNIVERSAL INDICATOR BY PAPER CHROMATOGRAPHY AND TO DETERMINE THEIR Rf VALUES.
THEORY: Chromatography is a simple technique of separating micro-quantities of substances in a mixture. It was first discovered by a…
33. TO SHOW THE PRESENCE OF OXYGEN IN AIR AND TO DETERMINE ITS PERCENTAGE BY VOLUME.
THEORY: Burning is one of the most familiar examples of chemical changes. The fact that air is essential for burning…
