dhoran 10 english nidan kasoti paper solution march 2021_19 march 2021 angreji paper solution std 10

Calculate OH^- concentration at the equivalent point when a solution of 0.1 M acetic acid is titrated with a solution of 0.1 M NaOH. Ka for the acid = 1.9 xx 10^(-5) .

Calculate the pH at equivalence point when a solution of 0.10 M acetic acid is titrated with a solution of 0.10 M hydroxide (K_(a) " for acetic acid is " 1.9 xx10^(-5))

A sweet smelling liquid A has molecular formula C_5 H_(10) O_2 A does not change colour of moistened litmus paper but on acid hyrolysis produces two fragments B and C. B gives effervescence with aqueous NaHCO_3 but 'C' does not 'C' on treatment with PCl_5 gives an alkyl chloride 'D' 'D' on dissolving in Etheral solution of Mg and passing CO_2 through this solution and finally acidifying product with HCl gave B. Identify A to D.

A solution is found to contain [CI^(Theta)] = 1.5 xx 10^(-1)M, [Br^(Theta)] = 5.0 xx 10^(-4)M, [CrO_(4)^(2-)] = 1.9xx 10^(-2)M . A solution of AgNO_(3) (100 % dissociated) is added to the above solution drop by drop. Which silver salt will precipiate first ? Given: K_(sp) (AgCI) = 1.5 xx 10^(-10), K_(sp) (AgBr) = 5.0 xx 10^(-13),K_(sp) (Ag_(2)CrO_(4)) =1.9 xx 10^(-12) .

The Salt Story From: The New Indian Express 9 March 2021 The salt pans in Marakkanam, a port town about 120 km from Chennai are the third largest producer of salt in Tamil Nadu. Separation of salt from water is a laborious process and the salt obtained is used as raw materials for manufacture of various sodium compounds. One such compound is Sodium hydrogen carbonate, used in baking, as an antacid and in soda acid fire extinguishers. The table shows the mass of various compounds obtained when 1litre of sea water is evaporated What is the saturated solution of Sodium Chloride called?

Refer to an aqueous solution of formic acid, HCOOH , which has a K_(a) value of 1.9 xx 10^(-4) at 25^(@)C . How many moles of sodium formate must be added to 1.0L of a 0.20M formic acid solution to produce a pH of 4.00 ?