17, Predict whether the product ratio of the following reactions will be 50:50 or a number other than 50:50. Cu salt THE ercises CH OCCCH,CH, O H. Cu salt THF CH, CH,CH,
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- Prove that the Keq for the reaction between Pb2+ and HF is 12.4. (Ksp, PbF2 = 6.76 x 10-4 and dissociation constant of HF is 3.7 x 10-8)Fill in necessary products reactants or reagants of these reactions. Please note the existence of enantionmers in some cases.complete this reaction Fe³= ........agent (from-to) S2O3= .........agrnt (from-to).
- Predict the product of the following reaction and classify the reaction. Pb(NO3)2+FeSO4--->PbSO4+________A wittig reaction experiment: Week 1 -》 preparation of phosphonium salt Materials : triphenylphosphine (5.3g),methyl Bromoacetate 3.36g (2.1ml) , ethanol 30ml . The yield obtained was 8.93g . Calculate the percentage yield Week 2 -》 Formation of the tlide and wittig reaction Materials :Phosphonium salt (5g), napthyl-2- carboxwaldehyde( 2.65g), 20 ml of water and 5 nl of Nahco3. Yield obtained was 0.51g .Calculate the percentage yield Week 3: Solvent free wittig reaction Materials: Benzyltriphenylphosphonium chloride (0.5g ), 4 - Bromoabenzaldehyde (0.24g), Potassium phosphate (tribasi c) 0.275g .The yield obtained was 1.21g. Calculate the percentage yieldChoose the answer that best represents the products of the following reaction. Potassium carbonate is reacted with phosphoric acid. A. 2 K3PO4 (aq) + 3 H2O (l) + 3 CO2 (g) B. K2CO3 + H3PO4 C. 3 K2CO3 + 2 H3PO4 D. 2 K3PO4 (aq) + 3 H2CO3 (aq)
- The reported melting point for this product is 159-161 degree C. What does a lower melting point (97-100) of the product suggest about the reaction outcome?Phenols (ArOH) are relatively acidic, and the presence of a substituent group on the aromatic ring has a large effect. The pKa of unsubstituted phenol, for example, is 9.89, while that of p-nitrophenol is 7.15. Draw resonance structures of the corresponding phenoxide anions and explain the data.Choose the best reagents from the list provided below for carrying out the following conversion. Match the reagent with the step number. HCl (aq), Zn(Hg) KMnO4, H3O+ CH3Cl, AlCl3 HNO3, H2SO4 Cl2, FeCl3 fuming sulfuric acid
- Describe how the product is purified. 4,4'-DIBROMOBIPHENYL [Biphenyl, 4,4'-dibromo-] Submitted by Robert E. Buckles and Norris G. Wheeler1. Checked by R. S. Schreiber, Wm. Bradley Reid, Jr., and Robert W. Jackson. 1. Procedure In a 15-cm. evaporating dish is placed 15.4 g. (0.10 mole) of finely powdered biphenyl (Note 1). The dish is set on a porcelain rack in a 30-cm. desiccator with a 10-cm. evaporating dish under the rack containing 39 g. (12 ml., 0.24 mole) of bromine. The desiccator is closed, but a very small opening is provided for the escape of hydrogen bromide (Note 2). The biphenyl is left in contact with the bromine vapor for 8 hours (or overnight). The orange solid is then removed from the desiccator and allowed to stand in the air under a hood for at least 4 hours (Note 3). At this point, the product weighs about 30 g. and has a melting point in the neighborhood of 152°. The crude 4,4'-dibromobiphenyl is dissolved in 75 ml. of benzene, filtered, and cooled to 15°. The…What is the percent dissociation of 0.150 M triethylamine? (The Kb value for triethylamine is 5.25 × 10-4.) a. 5.92 %b. 5.75 %c. 39.4 %d. 5.75 x 10-30 %Predict and draw the structural formal of the product(s) of each of the reactions below. Butanone+H2 -------> Pt