Experiment 6. Assay of Ammonium Chloride
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26 Terms
Ammonium Chloride
white crystalline solid highly soluble in water
analyte
Ammonium Chloride is used as an ____________ in the experiment
NH4OH
Ammonium Chloride is an acidic salt formed from the neutralization of a weak base a._______________ and a strong acid b.________________.
a = ?
HCl
Ammonium Chloride is an acidic salt formed from the neutralization of a weak base a._______________ and a strong acid b.________________.
b = ?
nitrogen supply
PRINCIPAL USE OF NH4Cl:
a. A ___________________ in fertilizers
b. ________________ in dry cells
a = ?
Electrolytes
PRINCIPAL USE OF NH4Cl:
a. A ___________________ in fertilizers
b. ________________ in dry cells
b = ?
Systemic and Urinary Acidifier
MEDICINAL USE OF NH4Cl:
a. Treat alkalosis resulting from excessive use of alkalinizing drugs
b. An ________
c. promote urine production
a = ?
expectorant
MEDICINAL USE OF NH4Cl:
a. Treat alkalosis resulting from excessive use of alkalinizing drugs
b. An ________
c. promote urine production
b = ?
Diuretic
MEDICINAL USE OF NH4Cl:
a. Treat alkalosis resulting from excessive use of alkalinizing drugs
b. An ________
c. promote urine production
c = ?
Systemic or Metabolic Acidosis
Adverse Effects of NH4Cl:
Volhard’s Method
Involves the addition of an excess Ag +1 (AgNO3) to a halide solution (NH4Cl) followed by a back titration of the excess with thiocyanate (KSCN).
0.1 - 0.2 grams of ammonium chloride
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
1 = ?
50mL of distilled water
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
2 = ?
50mL of a standard silver nitrate solution
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
3 = ?
3mL of concentrated nitric acid
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
4 = ?
Filter
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
5 = ?
Wash the precipitate
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
6 = ?
washing and the filtrate
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
7 = ?
2mL of ferric alum indicator
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
8 = ?
flesh
PROCEDURE: ASSAY OF AMMONIUM CHLORIDE
1. Weigh accurately ____________________________ in a tared Erlenmeyer flask.
2. Dissolve it in ________________________.
3. Run down _________________________________ from an acid burette.
4. Add ___________________________.
5. ______ the solution.
6. ________________________ with 10mL of distilled water.
7. Combine the __________________________.
8. Add ________________________________ to the solution in #7.
9. Titrate the excess silver nitrate solution with standard potassium thiocyanate to a _____ color endpoint.
9 = ?
carbonates or phosphates
The addition of conc. Nitric Acid prevents the:
a. precipitation of Ag+ as _______________________________.
b. Prevent hydrolysis of _____________.
a = ?
Fe +3 alum
The addition of conc. Nitric Acid prevents the:
a. precipitation of Ag+ as _______________________________.
b. Prevent hydrolysis of _____________.
b = ?
AgCl ppt
The filtration of the solution prior to washing is done to remove the ___________ which may interact with KSCN
AgNO3
Washing the precipitate with distilled water is to done to remove the ______ in AgCl ppt.
unreacted AgNO
Combining the washing and the filtrate will remove the AgCl and collect the ____________________.
Orange/Red
Overstep color
