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The two common chlorides of phosphorus, PCI3 and PCI5, both important in the production of other phosphorus compounds, coexist in equilibrium through the reaction
PCI3(g) + Cl2(g) → PCI5(g)
At 250°C, an equilibrium mixture in a 2.50 L flask contains 0.105g PCI5, 0.220g PCI3 and 2.12g Cl2. What are the values of (a) Kc and (b) Kp for this reaction at 250°C?
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Chronium (II) sulfate, CrSO4, is a reagent that has been used in certain applications to help reduce carbon-carbon double bonds (c=c) in molecules to single bonds (c-c). The reagent can be prepared by the following reaction.
Zn(s) + K2Cr2O7(aq) + H2SO4(aq) → ZnSO4(aq) + CrSO4(aq) + K2SO4(aq) + H2O
What is the maximum number of grams of CrSO4 that can be made from a reaction mixture containing 3.2 mol Zn, 1.7 mol K2Cr2O7 and 5.0 mol H2SO4?
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CH3CO2H(1)+2O2(q)--------> 2CO2(q)+2H2O(1)
Solubilitatea acetanilidei în apă fierbinte este 5,5 g/100 mL la 100oC iar solubilitatea în apă rece la 0oC este 0,053 g/100 mL. Care ar fi procentul maxim teoretic de recuperare a acetanilidei prin cristalizarea a 5 g de acetanilidă din 100 mL apă presupunând că soluţia este răcită la 0oC.
Oleic acid and elaidic acid are these isomers? If they are you should indicate it.
what type of alcohol is 2-methyl-2-pentanol
Analyse the therapeutic or chemical effects of isomerism. Research the drugs thalidomide and ibuprofen, and their therapeutic effects. Both drugs have optical isomers: compare the structures and properties of the optical isomers in each case study. Explain why one of these drugs is only available as a single optical isomer whilst the other is sold as a racemic mixture (a 50:50 mixture of both optical isomers). Discuss the implications of having to separate a racemic mixture into its stereoisomers and the implications if the two stereoisomers are not separated, with reference to the two drugs in detail
1.Account with the aid of a detailed mechanism for the fact that addition of HCl to 1-bromopropene gives exclusively 1-bromo-1-chloropropane.
2.(S)-2-butanol slowly racemizes in dilute acid solution.Propose a mechanism.
3.Use the electronic factors to explain why hydrogen attached to a nitrogen of a sulfonamide is acidic.
CONDENSED STRUCTURAL FORMULA OF FOLLOWING THEN IDENTIFY IF IT IS ALKANE, ALKENE, ALKYNE.
1. 5,5 – diethyl – 3,3 – dimethyl – 1 - octyne
2. 2,4,4,6 – tetraethyl – 3,3 – nondiene
3. 1,1,4,4 – tetramethylheptane
For your experiments, you are required to dilute 8 mL of a glucose solution (molar mass = 180.156 g/mol) with a concentration of 0.25 mol L-1 to a volume of 0.5 L.
a) What is the concentration of the final, diluted solution?
b) How much solvent do you need to make this diluted solution of glucose? Express your answer in mL, to the nearest whole number.
c) After using all of your glucose solution in experiments you require another batch to continue your work. How many grams of glucose would you need to re-make the 0.25 mol L-1 solution?
