Make a methodology flow chart with this qualitative analysis of these anions. The methodology used in identifying the anions will be different than that which was used to identify cations. Here you will use a small portion of the unknown mixture (1 mL) to perform a spot test for each anion individually. Procedure: Test for carbonate ion (CO32-) Add 1 mL of 1M Na2CO3 (or your unknown) and 1 mL of 6M HCl to a small test tube. C. Test for sulfate ion (SO42-) Add 1 mL of 0.5 M Na2SO4 (or your unknown) and 1 mL of 6 M HCl to a small test tube. Next add a few drops of 1 M BaCl2. D. Test for phosphate ion (PO4 3-) Add 1 mL of 0.5 M Na2HPO4 (or your unknown) and 1 mL of 6 M HNO3 to a small test tube. Next add a 1 mL of 0.5 M (NH4)2MoO4 and stir thoroughly. Place the test tube in the hot water bath and continue to stir. E. Test for thiocyanate ion, (SCN-) Add 1 mL of 0.5 M KSCN (or your unknown) and 1 mL of 6 M acetic acid (HC2H3O2) to a small test tube. Now add 2 drops of 0.1 M Fe (NO3)3. A dark red solution indicates the presence of SCN-. F. Test for chloride ion, (Cl2-) Add 1 mL of 0.5 M NaCl (or your unknown) and 1 mL of 6 M HNO3 to a small test tube. Next add 2 to 3 drops of 0.1 M AgNO3. G. Test for nitrate ion, (NO3 –) Add 1 mL of 0.5 M NaNO3 (or your unknown) and 1 mL of 6 M NaOH to a small test tube. Then add a few granules of aluminum metal and put the test tube in the hot water bath. Place a red litmus paper directly above the test tube.
Make a methodology flow chart with this qualitative analysis of these anions. The methodology used in identifying the anions will be different than that which was used to identify cations. Here you will use a small portion of the unknown mixture (1 mL) to perform a spot test for each anion individually.
Procedure:
- Test for carbonate ion (CO32-)
Add 1 mL of 1M Na2CO3 (or your unknown) and 1 mL of 6M HCl to a small test tube.
C. Test for sulfate ion (SO42-)
Add 1 mL of 0.5 M Na2SO4 (or your unknown) and 1 mL of 6 M HCl to a small test tube. Next add a few drops of 1 M BaCl2.
D. Test for phosphate ion (PO4 3-)
Add 1 mL of 0.5 M Na2HPO4 (or your unknown) and 1 mL of 6 M HNO3 to a small test tube. Next add a 1 mL of 0.5 M (NH4)2MoO4 and stir thoroughly. Place the test tube in the hot water bath and continue to stir.
E. Test for thiocyanate ion, (SCN-)
Add 1 mL of 0.5 M KSCN (or your unknown) and 1 mL of 6 M acetic acid (HC2H3O2) to a small test tube. Now add 2 drops of 0.1 M Fe (NO3)3. A dark red solution indicates the presence of SCN-.
F. Test for chloride ion, (Cl2-)
Add 1 mL of 0.5 M NaCl (or your unknown) and 1 mL of 6 M HNO3 to a small test tube. Next add 2 to 3 drops of 0.1 M AgNO3.
G. Test for nitrate ion, (NO3 –)
Add 1 mL of 0.5 M NaNO3 (or your unknown) and 1 mL of 6 M NaOH to a small test tube. Then add a few granules of aluminum metal and put the test tube in the hot water bath. Place a red litmus paper directly above the test tube.
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