Determine the pH of an HF solution of each concentration. In which cases can you not make the simplifying assumption that x is small? (Ka for HF is 6.8 * 10-4.)a. 0.250 M b. 0.0500 M c. 0.0250 M

You must base your solutions for this problem on vapor pressure correlations in the form of Antoine's Equation In psat 1 mm Hg with the following parameter values: Compound i benzene toluene Ethylbenzene n-propylbenzene n-butylbenzene A₁ 15.9008 16.0137 16.0195 16.0062 16.0793 B₁ A₁ T+ Cu T+C₁ B₁ 2788.51 3096.52 3279.47 3433.84 3633.40 G₁ -52.36 -53.67 -59.95 -66.01 -71.77 T is in Kelvin and Pat is in mm Hg. Note that more data is given than needed to solve the problem. (As is often the case when looking up data...) a) Calculate and plot the Txy phase diagram for vapor-liquid equilibria of binary mixtures of benzene (light) and ethylbenzene (heavy) at atmospheric pressure. Assume validity of Raoult's law. b) Use your results from part a) to plot the xy equilibrium curve for vapor-liquid equilibria of binary mixtures of benzene and ethylbenzene at atmospheric pressure. Remember that the plots are to use mole fraction of the lighter component as their axes. Banzane *

enthalpy given a non-ideal gas equation of state Consider a gas that demonstrates the following equation of state: P(V - b) = RT Determine if enthalpy is only a function of T (like if a gas is ideal) or if it is a function of both T and P. solution guide: 1. Obtain the exact differential of H with respect to T and P. 2. Derive the exact differential to an equation which has Cp and 3. Obtain (3) P from the equation of state above. ат av and state your final answer. 4. Plug (37) p.

A liquid mixture is made of 15 kg Benzene (MW= 78), 30 kg Toluene (MW=92) and 15 kg Xylene (MW=106) the average molecular weight of this mixture is: Answer:

The results of air temperature measurements obtained a dry bulb temperature of 50°C and a wet bulb temperature of 31°C. Using a Psychrometric chart, determine the properties of the air as follows: a. Air humidity = % b. Water content = kg water / kg air c. Specific volume = m3 / kg d. Enthalpy = kJ / kg e. Condensation temperature = °C If the air is in 162 m3 space, determine, f. Air weight (dry air and water vapor) = kg g. The amount of water content in the space = kg

According to the experiments, the change in entropy of 200 g of water when heated from an unknown temperature to 90 ⁰C at constant pressure is 250 J/K. Cp of water, assumed to be constant throughout the process, is 4.186 J/g-K. Determine the initial density of water (in kg/m³) before it was being heated. Density of water at different temperatures is presented (use this table only). Answer Format: [2 decimals]

A student has prepared a solution containing two acids : H2A ( PK , = 2.1 , 7.2 ) and H2B ( pKg = 6.4 , 10.3 ) . If the solution is at a pH of 8.05 , which combination shown below is buffering the solution ?

If you know pure nitrogen gas has a pressure of 1 atm, how many intensive degrees of freedom does your system have? choose the correct one. 1) 1 , 2) 0 , 3) 3,  4) 2

Question 1. Derive an expression for the vapor density at the boiling point as a function of temperature. Assume that the ideal gas law is valid. The vapor density of water at 25°C is 23.4 g/m³. Calculate the vapor pressure and vapor density at 50°C.

Help with the following question please show all parts.