Wczytywanie zadań
Szukamy zadań...
Znalezionych zadań: 505
(i) Sketch the Maxwell–Boltzmann energy distribution curve for the particles in this reaction mixture at 25 °C, marking on the diagram the activation energy both with and without the catalyst. (ii) On the same axes, sketch and label a second Maxwell–Boltzmann…
For the overall reaction shown above, calculate the atom economy of this route from propane and ethane to propyl ethanoate. Use sections 1 and 7 of the data booklet.
What is the total number of ions in 0.30 mol of iron(III) nitrate, ? A. B. C. D.…
Describe the steps the student would follow to recrystallize the crude benzoic acid.
State the most important property that water must have, with respect to benzoic acid, for it to be a suitable solvent for this recrystallization.
Outline how each of the two by-products is removed from the benzoic acid during the recrystallization. By-product that is almost insoluble in hot water: ... By-product that is much more soluble than benzoic acid: ...
The volume of hot water used to dissolve the crude solid must be chosen carefully. Deduce the effect on the yield or on the purity of the recrystallized benzoic acid of using too much water and of using too little water. Too much water: ... Too little water:…
Chlorinated solvents such as tetrachloromethane, , and 1,1,1-trichloroethane, , were once common in laboratories, but their production is now restricted by an international agreement. Besides climate change, state the specific…
(i) If the reaction has a percentage yield of 80 %, calculate the mass, in g, of benzene that would be produced from 2.0 kg of cyclohexane. (ii) Calculate the atom economy for this reaction, as a percentage.
The forward reaction is endothermic, uses platinum as a catalyst, and takes place at 800 K. Sketch the reaction's energy profile both with and without the catalyst present, labelling the activation energies and .