ASSIGNMENT IN CHEMISTRY Essay Example | Topics and Well Written Essays - 1000 words

ASSIGNMENT IN CHEMISTRY - Essay ExampleAt that time, the counterweight mixture was quickly cooled in an ice bath and analyzed where the amount of A remaining was found to be 0.04 moles.b. What was the purpose of the ice bath The ice bath is used to commence the temperature of the mixture. Alcohols and esters are volatile substances and higher temperature will volatilize the said substances and might lead to analytical errors.a. the pressure is increase - According to Le Chatelier, the position of equilibrium will go along in such a way as to corrupt the change in pressure. That convey that the position of equilibrium will move so that the pressure is reduced again. Pressure is caused by gas molecules hitting the sides of their container. The more molecules you have in the container, the higher the pressure will be. The system tush reduce the pressure by reacting in such a way as to produce fewer molecules. In this case, there is 1 molecule on the left-hand side of the equation, and 2 on the right. Increasing the pressure on a gas reaction shifts the position of equilibrium towards the side with fewer molecules. In this case towards the reverse reaction.b. the temperature is increased - According to Le Chatelier, the position of equilibrium will move in such a way as to counteract the change. ... Alcohols and esters are volatile substances and higher temperature will volatilize the said substances and might lead to analytical errors.c. Give an expression for the equilibrium constant for the reaction and play a numerical value from the data provided.K = CH3COOCH3 H2O / CH3COOH CH3OH = .04 moles x 80 .04 moles x 20 / .04 moles 64 .04 moles x 36 = 3.2 0.8 / 2.56 1.44 = 0.6944d. Why is the volume not given (or not important in this instance) Volume is not given because it will not make any significant difference in the concentration of the substances present. 3. When Nitrogen (1 mole) and Hydrogen (3 moles) react at constant temperature at a pressure of 5 x 1 0 6 Pa, the equilibrium mixture was found to contain 0.6 moles of ammonia.a. Calculate mole fractions of both species involved at equilibrium.N2 + 3H2 2 NH3Mole fraction of N2 = 1- .06 moles = 0.94 / 5.74 = 0.1638Mole fraction of H2 = 3 (1-.06 moles) = 3.6 / 5.74 = 0.6272Mole fraction of NH3 = 2 (0.6) = 1.2 / 5.74 = 0.2090b. Calculate partial pressure of every species involved at equilibrium.Pressure = 5 x 106 PaPN2 = 0.94 RT/VPH2 = 3.6 RT/VPNH3 = 1.2 RT/Vc. Calculate Kp = pNH32 / pN2 pH234. vapourish phosphorous(V) Chloride dissociates reversibly as shown below PCl5 (g) PCl3 (g) + Cl2 (g) H = +ve Use Le Chateliers Principle to state and explain the effect on the position of the equilibrium whena. the pressure is increased - According to Le Chatelier, the position of equilibrium will move in such a way as to counteract the change in pressure. That means that the position of equilibrium will move so that the pressure is reduced again. Pressure