The reaction of nitrogen gas with hydloric acid is as follows:

N_{2 (g)} + 6 HCl _(g)  

please calculate the

1.theoretical yield,

2.percent yield, and

3. overall percent yield from benzaldehyde.

my products weight was 2.137 g

experiment was "Isolation of Tetraphenylcyclopentadienone, then Recrystalization of Tetraphenylcyclopentadienone"

HERE IS MY PROTOCOL I FOLLOWED TO GET MASS OF 2.137 g

THIS IS ALL AVAILABLE INFORMATION!!!

Add 1.5 g benzil, 1.5 g dibenzyl ketone, and 12 mL absolute ethanol to a 50-mL round-bottom flask. Place a magnetic stir bar in the flask. Attach a condenser, having lightly greased the joint. Stir and heat the mixture at 70ºC (with the condenser running) until the solids dissolve. Then raise the temperature to 80ºC with continued stirring. Using a 9" Pasteur pipette, add dropwise 2.25 mL of ethanolic potassium hydroxide solution through the condenser into the flask; make an effort to prevent any drops from contacting the condenser walls (each drop should fall directly into the reaction mixture). The mixture will immediately turn a dark purple. Once you have added the potassium hydroxide, raise the temperature to about 85ºC. Stir the mixture at this temperature for 15 minutes.

Isolation of Tetraphenylcyclopentadienone

At the end of the heating period, remove the flask from the heat and allow it to cool to room temperature. Then place the flask in an ice-water bath for 5 minutes to complete the crystallization of the product. Collect the deep purple crystals on a Büchner funnel by vacuum filtration. Wash the crystals with 3 4-mL portions of ice-cold 95% ethanol; this wash solvent should be used to transfer crystals from the round-bottom flask to the Büchner funnel if they do not all come out when the mixture is initially poured into the funnel. After air-drying the crystals for a few minutes, complete the drying in a 100ºC-oven for a few minutes.

Recrystallizing Tetraphenylcyclopentadienone

Recrystallize your tetraphenylcyclopentadienone from a 1:1 mixture of 95% ethanol and toluene; approximately 24 mL of this solvent mixture will be required per gram of tetraphenylcyclopentadienone, but remember to only add the minimum boiling solvent necessary to dissolve the solute. Recover the crystals by vacuum filtration (as above) and redetermine the melting point.

Weigh the dried product and calculate the percent yield. Also calculate the overall percent yield from benzaldehyde. Determine the melting point. If the melting point is not within 2ºC of the literature value, you should recrystallize your product (see below).

Al(OH)3(s) + HCl(aq) --> AlCl3(aq) + H2O(I) a) balance the equation b)calculate the number of grams s of HCl that can reacct with 0.500 g of Al(OH)3. c) calculate the number of AlCl3 and the number of grams of H2O formed when 0.500g of Al(OH)3 reacts. d) show that your calculations from parts b and c are consistent with the law of conservation of mass.

A textile finishing process involves drying a fabric that has been treated with a volatile solvent. The drying process involves evaporation of solvent and removal of solvent vapor by air. The wet fabric entering the dryer contains 50% solvent. Solvent-free air enters the dryer at a rate of 8 kilograms per kilogram of dry (solvent-free) fabric. The drying process is 96% efficient (i.e., 96% of the entering solvent is removed from fabric).

(a) Calculate the percentage of solvent in the dried fabric by weight.

(b) What is the concentration of solvent in the dryer exhaust (in g/m³) if the exhaust is at 80 degrees C and 1 atm? The solvent has a molecular weight of 86.

Find the Gibbs free energy for G(T,P) for an ideal gas with constant c_v.

Aqueous hydrochloric acid HCl will react with solid sodium hydroxide NaOH to produce aqueous sodium chloride NaCl and liquid water H₂O . Suppose 28.1 g of hydrochloric acid is mixed with 17. g of sodium hydroxide. Calculate the maximum mass of sodium chloride that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

What are the principles of surface sorption by solid?

1. Explain in terms of ion concentrations and Ksp why a precipitate forms for some solutions.

2. When ammonia is added to a solution that has Cu(OH)2(s) precipitate in it, the precipitate dissolves. Use Le Châtelier’sprinciple to explain this.

3. Based on your observations, when a colour change occurs but no phase change occurs, what kind of reaction might have occurred?

Choose all of the processes from below which describe changes which are independent of the path by which the change occurs.

the elevation increase experienced by a traveller travelling from Grand Isle, LA to Denver, Colorado


the work generated by the body of an athlete as it metabolizes the sucrose in a cube of sugar


the heat evolved when a cube of sugar is oxidized to CO₂(g) and H₂O(g)


the distance travelled by a steer in a rodeo attempting to evade capture


the amount of work required to build a house


the heat generated by a car engine as it burns a gallon of gasoline


the longitude decrease experienced by a traveller travelling from Baton Rouge, LA to London, England

Calculate the freezing point of a solution of 30.0 g methyl salicylate, C7H6O2, dissolved in 800. g of benzene, C6H6. Kf for benzene is 5.10

Find the IR and NMR spectra of Ibuprofen from the internet. Label the peaks and please give a detailed interpretation of the charts.

Use a table of thermodynamic data to calculate the enthalapy (delta H) for the following three reactions:

Mg (s) + 1/2 O2 (g) --> MgO (s)

Mg (s) + 2 HCl (aq) -----> MgCl2 (aq) + H2 (g)

MgO(s) + 2HCl(aq) ----> H2O(l) + MgCl2(aq)

The equilibrium constant, K, for the following reaction is 1.20×10-2 at 500 K. PCl5(g) PCl3(g) + Cl2(g) An equilibrium mixture of the three gases in a 1.00 L flask at 500 K contains 0.218 M PCl5, 5.11×10-2 M PCl3 and 5.11×10-2 M Cl2. What will be the concentrations of the three gases once equilibrium has been reestablished, if 3.92×10-2 mol of PCl3(g) is added to the flask? [PCl5] = M

[PCl3] = M

[Cl2] = M

28 mL of 0.10 M HCl is added to 60 mL of 0.10 M Sr(OH)2. Using proper unit cancellation, determine the concentration of OH− in the resulting solution.