Benzene and ethylbenze are to be separated in a single-stage flash vessel. The resulting liquid stream must have a composition of x₁= 0.35 and the resulting vapor stream must have a composition of y₁= 0.75. You may assume Raoult's law applies.

a) Determine what T and P must be in the vessel in order to carry out this separation, show all work and equations used.

b) What additional information is needed to compute the relative amounts of liquid and vapor leaving the vessel?

Calculate the pH of each of the solutions and the change in pH to 0.01 pH units caused by adding 10.0 mL of 2.05-M HCl to 570. mL of each of the following solutions.

a) water  

before mixing = 7

After mixing = 1.45

b) 0.135 M C₂H₃O₂^1-

^{Before mixing = 8.95}

^{After mixing = ?}

c) 0.135 M HC₂H₃O₂

_{Before mixing = ?}

_{After mixing = ?}

d) a buffer solution that is 0.135 M in each C₂H₃O₂^1- and HC₂H₃O₂

_{Before mixing = ?}

_{After mixing = ?}

I've tried this so many times and I don't understand it. Is there a formula or a set of formulas for this ?? Can someone please just spell it out for me step by step and why. Please and thank you!

If a solution containing 39.544 g of mercury(II) perchlorate is allowed to react completely with a solution containing 13.180 g of sodium dichromate, how many grams of solid precipitate will be formed?

How many grams of the reactant in excess will remain after the reaction?

When a bicyclic (or even polycyclic) compound such as ß-Naphthol is being brominated via EAS, how do I determine the locations on the molecule that will be substituted with bromine in the final product. This has to do with resonance structures of the molecule and O/P vs M directing effects of the substituent already on the ring before bromination. I'm just having trouble making the connection. Does it differ in any way compare to a molecule with only one ring, like phenol? An example and clarification would be great! Thanks!

What is the % yield of the reaction making 4.9 g of acetyl salicylic acid from 6.6 g of salicylic acid, 6.4 mL of acetic anhydride (density 1.082), and 10 drops 85 % weight phosphoric acid (density 1.685)? Molecular weights: Acetylsalicylic acid=180g salicylic acid=138g acetic anhydride= 102g

The reaction

2NOCl(g)=2NO(g)+Cl₂(g)

comes to equilibrium at 1 bar total pressure and 227C when the partial pressure of the nitrosyl chloride, NOCl, is 0.64 bar. Only NOCl was present initially. (a) Calculate delta_rG^o for this reaction. (b) At what total pressure will the partial pressure of Cl₂ be at 0.1 bar?

Consider the titration ofa 25.0 mL solution0.150 M HF with 0.150 M NaOH. What is the pH of the solution before addition of titrant, after addition of 10.0mL, and after addition of 25.0mL of titrant?

Consider the reaction: FeS(s) + 2HCl (aq) --> FeCl2(aq) + 2H2S(g). A 4.00g sample of FeS containing nonsulfuide impurities reacted with HCl to give 896mL of H2S at 14C and 782 mmHg.Calculate mass percent purity of the sample. State your final answer using 3 Sig figs

Equilibrium constants at 25 ?C are listed in the table below.

A 360.0 −mL buffer solution is 0.170 M in HF and 0.170 M in NaF.

A) What mass of NaOH could this buffer neutralize before the pH rises above 4.00?

B) If the same volume of the buffer was 0.360 M in HF and 0.360 M in NaF, what mass of NaOH could be handled before the pH rises above 4.00? I keep getting 1.8 g and 3.5 g, which is wrong.

50.00ml of a saturated solution of calcium hydroxide is titrated with (5.00 x 10^-2 M) HNO₃. The endpoint is reached when 24.40ml of the acid is added. What is the molarity and solubility (grams/liter of solution) of the Ca(OH)₂ solution?

Thank you

39

What is the theoretical yield (in g of precipitate) when 15.8 mL of a 0.572 M solution of iron(III) chloride is combined with 16.8 mL of a 0.687 M solution of lead(II) nitrate?

Air at 38.0°C and 99.0% relative humidity is to be cooled to 16.0°C and fed into a plant area at a rate of 510.0 m³/min. You may assume that the air pressure is 1 atm in all stages of the process.

Calculate the rate the water condenses in kg/min.

Question

Methane gas (CH4) enters a home heating furnace operating at steady state and burns completely with 110% of theoretical dry air, each stream entering at 77 F, 1 atm. Combustion products are discharged to the flue at 300 F, 1 atm. Return air from the house enters at 60 F, 1 atm, with a volumetric flow rate of 1000 ft3 /min and is supplied to heat the house at 120 F, 1 atm. Kinetic and potential energy effects can be neglected as can stray heat loss from the outside of the furnace to its surroundings. Determine required the fuel flow rate, in lbmol/s

Zn|Zn2+(1.00M)|| UO22+(1.00M), U4+(0.1M), H3O+(1.00M) |Pt

a) Calculate the potential in the following cell (no current is flowing)

b) The cathode has a volume of 50 mL. What is the cell potential (no current) after adding 10 mL, 25 mL, 50 mL, and 100 mL 1M NaOH to the cathode?

c) What is the Gibbs Free Energy for the 5 cells in a) and b). What is the spontaneous reaction in each case?