Pls solve Q30

Pls solve Q30 calculate 26. A mixture of Na2C03 & Na2S04, contains 53% Na2S04. fig of the mixture are dissolved & made upto 500 ml with water. What volume of decinormal acid will neutralize 100 ml of this solution. (Ans. 100 ml_) 27. A soln contains a mixture of 112SO, & oxalic acid; 25 ml of the soln requires 35.5 ml of NaOH for neutralisation & 23 • 45 ml of KMn04 for oxidation. Calculate (A) normality of the soln wx-t 112SOa & oxalic acid.(B) the number of gms of each of these present in I litre Of soln. 28) 804 g ofa sample of iron ore(containing only Fe and FeO) was dissolved in acid Fe was oxidised to +2 state & it required 117• 2 ml 1 12 N KMn04 soln for titration. Find 0/0 of Fe and Feo in the ore (Ans,FeO 3857% Fe= 6'1430,'6) 29. 0-1 g ofa polyvalent metal(A.W— 51), reacted with H2S04 to give 43.9 ml H2 at ST P. This soln containing metal in the lower oxidation state required 58. 8 ml of I N Kmn04 for complete oxidation, What are the oxidation states of the metal in the two reactions? (Ans. 2,5) (9 250 mL ofxM solution and 500 ml of YM solution ofa solute are mixed and diluted to 2 litre to produce a final 4.93 concentration of 1.6M. If x: y = 5 : 4, calculate x and y 2.013 g ofa sample of NaOH containing as an impurity was diluted to 250 ml A 10ml portion of this soln 263 0/01 required 20 ml of O. 1 N H2S04 for complete neutralization. Calculate % by weight of Na2C03 32. A mixture and NTLCI in the ratio 43.7% & 56.3% respectively was dissolved in water to prepare litre solution.25 ml of this soln was boiled with 50 ml of Nao NaOH until all the was evolved. The excess or NaOH was neutralized by 24.3 ml of HCI. Calculate weight of each component in mixture. [Ans. 262 g & 3.38 g] 33. A sample Of crystalline weighing 1.578 g was dissolved in water and the solution required 40 ofO.25N HN03 for complete reaction, Determine the no. of molecules of water of crystallization in base. [Nns. 81 of water should be added to 100 mL of this soln? Two acids are titrated separately each with 25 mL of N Na2CC_h soln. Volume of each acid used for this complete neutralization are 10 mL and 40 mL respectively. What vol of A and B would be mixed to produce of IN acid [Ans. 200 mL of A and 800 mL ofB] 36)500 ml of 2M HCL, 100 mL of 2M & I g equivalent of a monoacidic alkali are mixed together, of this soln required 20 ml ofNa2C03.XH20 soln obtained by dissolving143gNa2C03.xH20 in 1 Lt soln. X. 37) 2 gm ofa mixture ofNa2C03, NaHC03 & Na2S04 is heated. vol ofC02 evolved at mm Mg & 123.9 ml„. 1.5 g of the same sample requires 150 mL HU for neutralization. Calculate composition 38)10 Lt air containing C02 at STP passed through 100 mL O. 12N soln of Ca(OHj2 -The filtrate SO mL soln of HCI ofdensity 1.25 gm/l containing 0.35% by weight ofacid. Find amount