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A student reacted 1% ferric chloride with phenol and obtained a dark-purple solution. When 1% ferric...
What does a red/purple solution indicate for the ferric chloride test? What is the purpose of...
What does a red/purple solution indicate for the ferric chloride test? What is the purpose of performing this test?
A student obtained a vial of powder consisting of a mixture of iron (III) chloride hexahydrate...
A student obtained a vial of powder consisting of a mixture of iron (III) chloride hexahydrate (FeCl_3-6H_2O) and silver nitrate (AgNO_3) in unknown proportions. He weighed the vial with the powder in it and found the mass to be 20.560 g. He then poured the powder into a beaker and found the mass of the empty vial to be 15.723 g. Water was added (500 mL) to powder in the beaker, and the contents were mixed and heated for 15...
3. The following %T data were obtained for a phenol red solution at 560 nm. when two drops of con...
3. The following %T data were obtained for a phenol red solution at 560 nm. when two drops of concentrated HCI were added to the pH 7.13 solution, the indicator was converted to pure Hin form. Its measured absorbance, AHI , was 0.0003. When two drops of 50% NaOH were added to the pH 8.56 solution, the result was pure In' form. The measured absorbance of this solution, Aln-, was 0.712. Calculate the A and pKa value for eaclh solution...
Show all work please A student in the chemistry lab reacted liquid hexane (C_6H_14) with oxygen...
Show all work please
A student in the chemistry lab reacted liquid hexane (C_6H_14) with oxygen of the air to produce carbon dioxide gas and liquid water. Write a balanced chemical equation for the reaction How many O_2 molecules are required to react completely with 48.8 g of C_6H_14? How many grams of carbon dioxide are produced from 48.8 g of C_6H_14? Determine the amount of Cu_3P formed if 175 grams of copper is reacted with 35.0 grams of P4....
Advance Study Assignment: Analysis of an Unknown Chloride . A student performed this experiment and obtained...
Advance Study Assignment: Analysis of an Unknown Chloride . A student performed this experiment and obtained the following concentration values: 0.02813 M. 0.02802 M, and 0.02788 M. a. What is the mean concentration? M b. What is the standard deviation of these results? 2. A 10.00 mL diluted chloride sample required 13.89 ml. of 0.02014 M AgNO, to reach the Fajans endpoint. How many moles of CIT ion were present in the sample? (Use Eqs. 2 and 3.) a. moles...
1. C. A student reacted anisole with acetic anhydride in dichloromethane using aluminum chloride as a...
1. C. A student reacted anisole with acetic anhydride in dichloromethane using aluminum chloride as a catalyst. The student used the experimental procedure as described in the laboratory manual. At the end of the experiment the student failed to get 4 methoxyacetophenone. Give reasons for the student's failure to get the product.
1. A student carries out a back titration to determine the concentration of ammonium chloride in a solution. The student...
1. A student carries out a back titration to determine the concentration of ammonium chloride in a solution. The student collects 10.80 mL of the original NH4Cl solution and dilutes it to 250.0 mL (we will refer to this as the dilute NH4Cl solution). Then 25.00 mL of the dilute NH4Cl solution are transferred to an Erlenmeyer flask and 25.00 mL of 0.1963 M NaOH are added. Calculate the moles of NaOH added to this Erlenmeyer flask. 2. In the...
Please workout solution, thank you! L__ of 15 points) A student pipettes 25.00 mL of 0.150...
Please workout solution, thank
you!
L__ of 15 points) A student pipettes 25.00 mL of 0.150 M methylamine (CH3NH2) solution into a flask, titrating the solution with 0.150 M HCI. a) What is the pH when 0.00 mL of the titrant has been added? b) What is the pH when 25.00 mL of the titrant has been added? c)Indicate which of the following indicators should be used for the titration? Indicator pKa Indicator pka Cresol red 1.5 Erythrosin B 2.9...
1.) in the laboratory, a student measures the percent ionization of a 0.463 M solution of...
1.) in the laboratory, a student measures the percent ionization of a 0.463 M solution of acetylsalicylic acid (aspirin), HC9H7O4, to be 2.46%. Calculate the value of Ka from this experimental data. Ka = ???? 2.) Calculate the percent ionization of a 0.419 M solution of hydrofluoric acid. % ionization = ???? % 3.) in the laboratory, a student measures the percent ionization of a 0.463 M solution of phenol (a weak acid), C6H5OH, to be 1.51 x 10^-3%. Calculate...
why bail blue of [Cu(H2O)6]^2+ can turn dark blue when ammonia solution is added?
why bail blue of [Cu(H2O)6]^2+ can turn dark blue when ammonia solution is added?
A student obtained a vial of powder consisting of a mixture of iron (III) chloride hexahydrate (FeCl_3-6H_2O) and silver nitrate (AgNO_3) in unknown proportions. He weighed the vial with the powder in it and found the mass to be 20.560 g. He then poured the powder into a beaker and found the mass of the empty vial to be 15.723 g. Water was added (500 mL) to powder in the beaker, and the contents were mixed and heated for 15...
3. The following %T data were obtained for a phenol red solution at 560 nm. when two drops of concentrated HCI were added to the pH 7.13 solution, the indicator was converted to pure Hin form. Its measured absorbance, AHI , was 0.0003. When two drops of 50% NaOH were added to the pH 8.56 solution, the result was pure In' form. The measured absorbance of this solution, Aln-, was 0.712. Calculate the A and pKa value for eaclh solution...
Show all work please
A student in the chemistry lab reacted liquid hexane (C_6H_14) with oxygen of the air to produce carbon dioxide gas and liquid water. Write a balanced chemical equation for the reaction How many O_2 molecules are required to react completely with 48.8 g of C_6H_14? How many grams of carbon dioxide are produced from 48.8 g of C_6H_14? Determine the amount of Cu_3P formed if 175 grams of copper is reacted with 35.0 grams of P4....
Advance Study Assignment: Analysis of an Unknown Chloride . A student performed this experiment and obtained the following concentration values: 0.02813 M. 0.02802 M, and 0.02788 M. a. What is the mean concentration? M b. What is the standard deviation of these results? 2. A 10.00 mL diluted chloride sample required 13.89 ml. of 0.02014 M AgNO, to reach the Fajans endpoint. How many moles of CIT ion were present in the sample? (Use Eqs. 2 and 3.) a. moles...
1. C. A student reacted anisole with acetic anhydride in dichloromethane using aluminum chloride as a catalyst. The student used the experimental procedure as described in the laboratory manual. At the end of the experiment the student failed to get 4 methoxyacetophenone. Give reasons for the student's failure to get the product.
Please workout solution, thank
you!
L__ of 15 points) A student pipettes 25.00 mL of 0.150 M methylamine (CH3NH2) solution into a flask, titrating the solution with 0.150 M HCI. a) What is the pH when 0.00 mL of the titrant has been added? b) What is the pH when 25.00 mL of the titrant has been added? c)Indicate which of the following indicators should be used for the titration? Indicator pKa Indicator pka Cresol red 1.5 Erythrosin B 2.9...
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