Homework Answers
ans.) consider electrolytic series chart , in the chart pb2+ comes above the hydrogrn atom and Cu2+ comes right below it ,
this indicates that pb2+ undergoes reduction very fast when compared to cu2+ , therefore addition of Hcl to a mixture gives PdCl2 molecules very fast .which can be identified as a precipitate leaving behind the cu2+ ions.
and the excessive addition of the acid leads to the formation of complexes
a.) Ni ions and cuprous ions can be identifiable . Ni2+ reacts with dilute acids like HCl whereas Cu2+ doesn't.
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Would it be possible to confirm the presence of Cu^2+ or Ni^2+ in a mixture of...
Prelab Questions 1. Briefly describe the hazards associated with each of the following chemicals and the...
Prelab Questions 1. Briefly describe the hazards associated with each of the following chemicals and the appropriate precautions to be taken. a. Ba(NO), b. 1 M HCl c. Pb(NO), d. KSCN 2. Discuss the difference between qualitative and quantitative analysis, Which type is utilized in this exercise? Postlab Questions A student studied some reactions involving P C and N ons. First, the student reacted the individual metal cations with 1 M HCl and 1 M NaOH solutions. The student then...
solve question The table below lists results of data collected for known solutions of Pb2", Cu...
solve question
The table below lists results of data collected for known solutions of Pb2", Cu and N when test solutions of HCl, NaOH and NH3 are added. Use results from the Table to answer questions below Test solution added Known solution Observations A white precipitate formed. The precipitate dissolved upon addition of more HCI solution HCI NaOH A white precipitate formed NHs No change was evident in the white precipitate. HCI No reaction NaOH A blue precipitate formed NH...
I am sort of confused on what these are asking? An explination of the concepts would really help, I will give thumbs up...
I am sort of confused on what these are asking? An explination
of the concepts would really help, I will give thumbs up :)
3. Consider the following reactions: a) The formation of tetraaqua copper (Il) ion in solution Cu2+ + 4H2O(l) = [Cu(H2O)4](aq) b) The reaction of ammonia with water. NH3(aq) + H2O(l) = NH4+ (aq) + OH(aq) c) The self ionization of water 2H2O(0) — H3O*(aq) + OH(aq) d) The formation of copper (II) hydroxide [Cu(H20)4]2+ (aq) +...
2. What will you observe when you have a positive test for: (a) bicarbonate anion(HCO3-)? •...
2. What will you observe when you have a positive test for: (a) bicarbonate anion(HCO3-)? • Bubbles Dobre lieT like gas o colorless (b) phosphate anion(PO43-)? 1. A student studied some reactions involving Pb2+ ion, copper(II) ion (Cu2+), and nickel(II)ion (Ni2+). The student first observed the behavior of individual solutions of Pb(NO3)2, copper(II) nitrate, Cu(NO3)2, nickel(II) nitrate, Ni(NO3)2, interacting individually with 1M HCl solution and then individually with 1M sodium hydroxide solution (NaOH). The student also added an aqueous ammonia...
Group I Cations A INTRODUCTION Most metal halides are soluble in water and dilute hydrochloric acid....
Group I Cations A INTRODUCTION Most metal halides are soluble in water and dilute hydrochloric acid. The exceptions are silver ion, Ag mercurous ion, Hg,: and lead(II) ion, Pb. Consequently, the addition of HCI to a solution of metal cations leads to the selective precipitation of these three ions. While the theory behind the separation and identification of these ions has been outlined in the general discus- sion of the qualitative analysis scheme, some aspects of this chemistry need to...
an introduction to chemistry lab Pre-Lab Study Questions 1. How can the presence of an ion...
an introduction to chemistry lab
Pre-Lab Study Questions 1. How can the presence of an ion in a solution be detected? ไป dedeed by a lame the ions undec gp color changes By com paring knoum olion o a unKnown vo Can co ure he color ehanges in he lame If a reaction produces an insoluble salt, what will you notice happening in the test tube? 2. So,It wany saヅdissolved and tt a, precipitate oat, solut kan bep eadind on...
5. To confirm cobalt ion, nitrite ion is added. a. What is seen if nitrite is...
5. To confirm cobalt ion, nitrite ion is added. a. What is seen if nitrite is present? b. What is the chemical formula of this substance? c. What is the name of this substance? 6. The filtrate containing Fet. Mn?, AP, Crand Zn? is heated with 6M HNO3. a. What is the purpose of this process? Give a chemical equation that describes the reaction and explain why this is advantageous for the separation. b. The acid mixture is boiled to...
A) Consider the insoluble compound zinc hydroxide, Zn(OH)2. The zinc ion also forms a complex with...
A) Consider the insoluble compound zinc hydroxide, Zn(OH)2. The zinc ion also forms a complex with ammonia. Write a balanced net ionic equation to show why the solubility of Zn(OH)2(s) increases in the presence of ammonia and calculate the equilibrium constant for this reaction. For Zn(NH3)42+, Kf = 2.9×109. Specify states such as (aq) or (s) and provide K. K = ______ B) Consider the insoluble compound nickel(II) hydroxide, Ni(OH)2. The nickel ion also forms a complex with cyanide ions....
NICKEL (II) The reaction with DMG gives: [Ni(DMG)212 (aq) The reaction with HCl gives: [NiClg(aq) The...
NICKEL (II) The reaction with DMG gives: [Ni(DMG)212 (aq) The reaction with HCl gives: [NiClg(aq) The reaction with ethylenediamine gives: [Ni(en)al2(aq) The reaction with NaOH gives: Ni(OH)2(s) The reaction with EDTA gives: [NIEDTA]2(ag) Write a balanced equation for each reaction. How many d electrons are there in Ni2* For each complex ion formed, indicate the coordination number of the copper atom. Name each complex. Do your best to sketch a 3D representation of each Are isomers possible? If so, what...
Consider the insoluble compound copper(II) hydroxide , Cu(OH)2 . The copper(II) ion also forms a complex...
Consider the insoluble compound copper(II) hydroxide , Cu(OH)2 .
The copper(II) ion also forms a complex with ammonia . Write a
balanced net ionic equation to show why the solubility of Cu(OH)2
(s) increases in the presence of ammonia and calculate the
equilibrium constant for this reaction. For Cu(NH3)42+ , Kf =
6.8×1012 . Use the pull-down boxes to specify states such as (aq)
or (s). + + K = Submit Answer
Voit needed for this question. Consider the insoluble...
Prelab Questions 1. Briefly describe the hazards associated with each of the following chemicals and the appropriate precautions to be taken. a. Ba(NO), b. 1 M HCl c. Pb(NO), d. KSCN 2. Discuss the difference between qualitative and quantitative analysis, Which type is utilized in this exercise? Postlab Questions A student studied some reactions involving P C and N ons. First, the student reacted the individual metal cations with 1 M HCl and 1 M NaOH solutions. The student then...
solve question
The table below lists results of data collected for known solutions of Pb2", Cu and N when test solutions of HCl, NaOH and NH3 are added. Use results from the Table to answer questions below Test solution added Known solution Observations A white precipitate formed. The precipitate dissolved upon addition of more HCI solution HCI NaOH A white precipitate formed NHs No change was evident in the white precipitate. HCI No reaction NaOH A blue precipitate formed NH...
I am sort of confused on what these are asking? An explination
of the concepts would really help, I will give thumbs up :)
3. Consider the following reactions: a) The formation of tetraaqua copper (Il) ion in solution Cu2+ + 4H2O(l) = [Cu(H2O)4](aq) b) The reaction of ammonia with water. NH3(aq) + H2O(l) = NH4+ (aq) + OH(aq) c) The self ionization of water 2H2O(0) — H3O*(aq) + OH(aq) d) The formation of copper (II) hydroxide [Cu(H20)4]2+ (aq) +...
2. What will you observe when you have a positive test for: (a) bicarbonate anion(HCO3-)? • Bubbles Dobre lieT like gas o colorless (b) phosphate anion(PO43-)? 1. A student studied some reactions involving Pb2+ ion, copper(II) ion (Cu2+), and nickel(II)ion (Ni2+). The student first observed the behavior of individual solutions of Pb(NO3)2, copper(II) nitrate, Cu(NO3)2, nickel(II) nitrate, Ni(NO3)2, interacting individually with 1M HCl solution and then individually with 1M sodium hydroxide solution (NaOH). The student also added an aqueous ammonia...
Group I Cations A INTRODUCTION Most metal halides are soluble in water and dilute hydrochloric acid. The exceptions are silver ion, Ag mercurous ion, Hg,: and lead(II) ion, Pb. Consequently, the addition of HCI to a solution of metal cations leads to the selective precipitation of these three ions. While the theory behind the separation and identification of these ions has been outlined in the general discus- sion of the qualitative analysis scheme, some aspects of this chemistry need to...
an introduction to chemistry lab
Pre-Lab Study Questions 1. How can the presence of an ion in a solution be detected? ไป dedeed by a lame the ions undec gp color changes By com paring knoum olion o a unKnown vo Can co ure he color ehanges in he lame If a reaction produces an insoluble salt, what will you notice happening in the test tube? 2. So,It wany saヅdissolved and tt a, precipitate oat, solut kan bep eadind on...
5. To confirm cobalt ion, nitrite ion is added. a. What is seen if nitrite is present? b. What is the chemical formula of this substance? c. What is the name of this substance? 6. The filtrate containing Fet. Mn?, AP, Crand Zn? is heated with 6M HNO3. a. What is the purpose of this process? Give a chemical equation that describes the reaction and explain why this is advantageous for the separation. b. The acid mixture is boiled to...
NICKEL (II) The reaction with DMG gives: [Ni(DMG)212 (aq) The reaction with HCl gives: [NiClg(aq) The reaction with ethylenediamine gives: [Ni(en)al2(aq) The reaction with NaOH gives: Ni(OH)2(s) The reaction with EDTA gives: [NIEDTA]2(ag) Write a balanced equation for each reaction. How many d electrons are there in Ni2* For each complex ion formed, indicate the coordination number of the copper atom. Name each complex. Do your best to sketch a 3D representation of each Are isomers possible? If so, what...
Consider the insoluble compound copper(II) hydroxide , Cu(OH)2 .
The copper(II) ion also forms a complex with ammonia . Write a
balanced net ionic equation to show why the solubility of Cu(OH)2
(s) increases in the presence of ammonia and calculate the
equilibrium constant for this reaction. For Cu(NH3)42+ , Kf =
6.8×1012 . Use the pull-down boxes to specify states such as (aq)
or (s). + + K = Submit Answer
Voit needed for this question. Consider the insoluble...
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