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7. If the hot solution in step 2 cooled to room temperature before centrifuging, how would...
Question: Procedure Separation and Identification of Pb2 (aq), Fe (aq), Al(a), and Cu Note: Tests should...
Question:
Procedure Separation and Identification of Pb2 (aq), Fe (aq), Al(a), and Cu Note: Tests should be performed concurrently on the known and the unknown solutions. Volumes are approximate. All work excepting the centrifugation should be done in the fume hood 1. To about 2. mL of your sample in a test tube, add 5 drops (-0.2 mL) of 6 M HCl(a). Mix well and centrifuge. Decant the clear liquid into a clean test tube and save it for Step...
EXPERIMENTAL PROCEDURE: GROUP I CATIONS Test a known solution that contains all 3 cations simultancously with...
EXPERIMENTAL PROCEDURE: GROUP I CATIONS Test a known solution that contains all 3 cations simultancously with your unknown. Follow the same procedure (separately) for both the unknown and known solutions. Wear gloves during all procedures. STEP 1: Precipitation of Group I. To 10 drops (only!) of the solution to be analyzed, add 2 drops 6 M HCl. Stir well. Centrifuge and decant the solution (S1) from the ppt (P1). Treat the ppt Pl according to Step 2. (There is no...
B. Solubility Equilibrium; Finding a Value for Ksp 2. Explain why PbCl 2 did not precipitate...
B. Solubility Equilibrium; Finding a Value for Ksp 2. Explain why PbCl 2 did not precipitate immediately on addition of HCl. What conditions must be met by [Pb2 + ] and [Cl- ] if PbCl 2 is to form? 3. Explain your observations in Steps 3 (The amount of precipitate begins to decrease as it dissolves in the hot water.) and 4 (The precipitate reappears, forming after the test tube was put in ice water.) of the procedure. In which...
I need help with the prelab and the flowchart. I’m totally clueless on the flowchart. For...
I need help with the prelab and the flowchart. I’m totally
clueless on the flowchart.
For the prelab questions I have some answers but I don’t know
if they’re right. If they’re wrong, I would greatly appreciate an
explanation for the correct answer. I’m really trying to learn the
material but it’s hard now that classes are cancelled so I’m sorry
if these are dumb
1. PbCl ?
2. Ag+
3. ?
4. S1
Group 1, the Chloride Group BACKGROUND...
I need help figuring out the flowchart and if I have the right answers for the...
I need help figuring out the flowchart and if I have the right
answers for the prelab please and thank you!
Group I, the Chloride Group BACKGROUND The precipitating reagent for the chloride group is chloride ion in an acidic solution. Only three of the 18 metal ions form a precipitate with this reagent: silver ion (Ag'), mercury(I)ion (Hg). and lead ion (Pb). Since lead chloride is somewhat soluble, it is not completely precipitated here, and a low concentration of...
DATA TABLE STEP 1 AgNO3 1,C,,2 STEP 3 Ba(NO3)2 SO - Decant white BaSO4 ppt (CONFIRMS...
DATA TABLE STEP 1 AgNO3 1,C,,2 STEP 3 Ba(NO3)2 SO - Decant white BaSO4 ppt (CONFIRMS SO2-) yellow Agl. AgCl ppt NH,OH yellow Agl. AgCl ppt RECYCLE Chemical Waste HNO blue litmus Decant white AgC ppt (CONFIRMS CT) yellow Agl.ppt (CONFIRMST) red spot 6. Refer to the Data Table to determine which anions (I-, Cl-, SO42-) are present and absent in an unknown solution given the following observations. • The unknown solution in test tube #1 plus AgNO3 gives a...
1. Write net ionic equations for ALL precipitation reactions of each anion studied in this e with Ag'(aq) and Ba (a), respectively, (in the absence of HNO,) at Bad 2 ptt disalv...
1. Write net ionic equations for ALL precipitation reactions of each anion studied in this e with Ag'(aq) and Ba (a), respectively, (in the absence of HNO,) at Bad 2 ptt disalve 51 과 IND Add about 10 drops of deionized water and 10 drops of 6 MNH, to the precipitate and mix thoroughly. Note that the Agl precipitate will persist; Agl is not soluble in NHs solution Confirmation Test for lodide Carry out confirmatory test for iodide as follow:...
help!! need tk balance the metals nickel(II), iron(III), manganese(II), and aluminum!! due in 20 minutes 4....
help!! need tk balance the metals nickel(II), iron(III),
manganese(II), and aluminum!! due in 20 minutes
4. Add 12 drops of water and 2 drops of 12 M hydrochloric acid and stir thoroughly for about a minute. Centrifuge and decant the solution immediately. Save the solution for Step 6. 5. Wash the precipitate from Step 4 with water and discard the washing. Add 5 drops of 6 M hydrochloric acid and 1 drop of 6M nitric acid. Heat in a water...
I am needing help finding the answers the first. I am just having a bad brain...
I
am needing help finding the answers the first. I am just having a
bad brain fart and cant figure it out to save my life.
please show how you calculated it and found what you
did.
Thanks!!
Data and Calculations Step 3 Initial concentrations [Pb2+ ] initial = Moles of Pb2+ ion = Moles of Clion = Step 4 Is there any precipitate? Record the total volume of HCI added until Total volume of HCI added: LOML the precipitate...
2. The instructions for Solution IV describe the preparation of a buffer solution. a. Calculate t...
post lab questions?
2. The instructions for Solution IV describe the preparation of a buffer solution. a. Calculate the pH of this buffer solution if it has an equal concentration of NHs and NH4 b. Does this solution buffer in the acidic, basic, or nearly neutral pH range? Explain. c. Explain why it is necessary to provide a buffer solution at this point in the procedure. Solution IV Add 2 drops NH.CI solution and check the pH of the solution...
Question:
Procedure Separation and Identification of Pb2 (aq), Fe (aq), Al(a), and Cu Note: Tests should be performed concurrently on the known and the unknown solutions. Volumes are approximate. All work excepting the centrifugation should be done in the fume hood 1. To about 2. mL of your sample in a test tube, add 5 drops (-0.2 mL) of 6 M HCl(a). Mix well and centrifuge. Decant the clear liquid into a clean test tube and save it for Step...
EXPERIMENTAL PROCEDURE: GROUP I CATIONS Test a known solution that contains all 3 cations simultancously with your unknown. Follow the same procedure (separately) for both the unknown and known solutions. Wear gloves during all procedures. STEP 1: Precipitation of Group I. To 10 drops (only!) of the solution to be analyzed, add 2 drops 6 M HCl. Stir well. Centrifuge and decant the solution (S1) from the ppt (P1). Treat the ppt Pl according to Step 2. (There is no...
I need help with the prelab and the flowchart. I’m totally
clueless on the flowchart.
For the prelab questions I have some answers but I don’t know
if they’re right. If they’re wrong, I would greatly appreciate an
explanation for the correct answer. I’m really trying to learn the
material but it’s hard now that classes are cancelled so I’m sorry
if these are dumb
1. PbCl ?
2. Ag+
3. ?
4. S1
Group 1, the Chloride Group BACKGROUND...
I need help figuring out the flowchart and if I have the right
answers for the prelab please and thank you!
Group I, the Chloride Group BACKGROUND The precipitating reagent for the chloride group is chloride ion in an acidic solution. Only three of the 18 metal ions form a precipitate with this reagent: silver ion (Ag'), mercury(I)ion (Hg). and lead ion (Pb). Since lead chloride is somewhat soluble, it is not completely precipitated here, and a low concentration of...
DATA TABLE STEP 1 AgNO3 1,C,,2 STEP 3 Ba(NO3)2 SO - Decant white BaSO4 ppt (CONFIRMS SO2-) yellow Agl. AgCl ppt NH,OH yellow Agl. AgCl ppt RECYCLE Chemical Waste HNO blue litmus Decant white AgC ppt (CONFIRMS CT) yellow Agl.ppt (CONFIRMST) red spot 6. Refer to the Data Table to determine which anions (I-, Cl-, SO42-) are present and absent in an unknown solution given the following observations. • The unknown solution in test tube #1 plus AgNO3 gives a...
1. Write net ionic equations for ALL precipitation reactions of each anion studied in this e with Ag'(aq) and Ba (a), respectively, (in the absence of HNO,) at Bad 2 ptt disalve 51 과 IND Add about 10 drops of deionized water and 10 drops of 6 MNH, to the precipitate and mix thoroughly. Note that the Agl precipitate will persist; Agl is not soluble in NHs solution Confirmation Test for lodide Carry out confirmatory test for iodide as follow:...
help!! need tk balance the metals nickel(II), iron(III),
manganese(II), and aluminum!! due in 20 minutes
4. Add 12 drops of water and 2 drops of 12 M hydrochloric acid and stir thoroughly for about a minute. Centrifuge and decant the solution immediately. Save the solution for Step 6. 5. Wash the precipitate from Step 4 with water and discard the washing. Add 5 drops of 6 M hydrochloric acid and 1 drop of 6M nitric acid. Heat in a water...
I
am needing help finding the answers the first. I am just having a
bad brain fart and cant figure it out to save my life.
please show how you calculated it and found what you
did.
Thanks!!
Data and Calculations Step 3 Initial concentrations [Pb2+ ] initial = Moles of Pb2+ ion = Moles of Clion = Step 4 Is there any precipitate? Record the total volume of HCI added until Total volume of HCI added: LOML the precipitate...
post lab questions?
2. The instructions for Solution IV describe the preparation of a buffer solution. a. Calculate the pH of this buffer solution if it has an equal concentration of NHs and NH4 b. Does this solution buffer in the acidic, basic, or nearly neutral pH range? Explain. c. Explain why it is necessary to provide a buffer solution at this point in the procedure. Solution IV Add 2 drops NH.CI solution and check the pH of the solution...
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