250g of CuSO4.XH2O on heating produced 159.89gCuSO4. Calculate the percent of water in the CuSO4.XH2O. Also determine the value of X. Find oxidation number of nitrogen in HNO3 when the oxidation numbers of H=+1 and O=2. Ethanol is an excellent organic solvent. It is used to prepare tinctures and in the extraction of medical compounds from plants. For this purpose, either pure ethanol or its aqueous solutions are used. A solution is prepared by mixing 1.0g of ethanol (C2H5OH) with 100g of water. Calculate molality of this solution. Calculate the pH of a buffer solution in which 0.11 molar CH3COONa and 0.09 molar acetic acid solutions are present. K2 for CH3COOH is 1.85105. Determine the molality of the following solutions: i. 3.5%(w/w) Glucose (aq) ii. 9.9gNaNO dissolved in 940g of water Calculate the oxidation number of Sulphur in H2SO4, when O. N. of H=+1 and O.N. of O=2. Calculate the mole fraction and mole percent of each component in a solution having 92g of ethyl alcohol, 96g of methyl alcohol and 90g of water. N2(g) and H2(g) combine to give NH3(g). The value of Kc in this reaction at 500C is 6.0102. Calculate the value of Kp for this reaction