CHEM 103 LAB 3 QUANTITATIVE AND
QUALITATIVE ANALYSIS ENTRY 2026
COMPLETE LAB REPORT QUESTIONS AND
ANSWERS GRADED A+ FULL SOLUTION
◉ What does the traditional method of analysis for metallic cations
involve? Answer: It involves the separation of the ions into groups
on the basis of solubilities in different solutions, and the subsequent
identification of the ions in a group on the basis of their different
chemical properties
◉ What happens if the solution only contains one positive ion (ex:
Na⁺, K⁺, etc.) out of a limited set? Answer: You can identify the ion
through its solubility properties (the formation of a particular
precipitate) when combined with particular reagents.
◉ What happens when there's more than one positive ion in a
sample? Answer: The identification of the ions becomes more
difficult, as it requires complex procedures including acid-base
reactions, complex ion formation reactions, oxidation-reduction
reactions, and precipitation reactions.
◉ What is the standard scheme of qualitative analysis? Answer:
Separating cations into four groups
, ◉ In semi-micro analysis, the quantities of solution are measured in
what? Solids are measured in what? Answer: - Drops
- Solids are measured in miligrams
◉ How many drops are in 1 mL? Answer: 20 drops
◉ How many drops are in 2 mL? Answer: 40 drops
◉ What is a filtrate? Answer: It's the clear liquid above the
precipitate
◉ What is a precipitate? Answer: It's an insoluble solid form that sits
on the bottom
◉ What is a centrifuge? Answer: A spinning device which separates
suspensions (a suspension is a heterogeneous mixture of a finely
distributed solid in a liquid)
◉ What do you add to form a precipitate? Answer: A test reagent
◉ What are the steps for precipitate completion? Answer: 1) Add a
test reagent to form a precipitate
QUALITATIVE ANALYSIS ENTRY 2026
COMPLETE LAB REPORT QUESTIONS AND
ANSWERS GRADED A+ FULL SOLUTION
◉ What does the traditional method of analysis for metallic cations
involve? Answer: It involves the separation of the ions into groups
on the basis of solubilities in different solutions, and the subsequent
identification of the ions in a group on the basis of their different
chemical properties
◉ What happens if the solution only contains one positive ion (ex:
Na⁺, K⁺, etc.) out of a limited set? Answer: You can identify the ion
through its solubility properties (the formation of a particular
precipitate) when combined with particular reagents.
◉ What happens when there's more than one positive ion in a
sample? Answer: The identification of the ions becomes more
difficult, as it requires complex procedures including acid-base
reactions, complex ion formation reactions, oxidation-reduction
reactions, and precipitation reactions.
◉ What is the standard scheme of qualitative analysis? Answer:
Separating cations into four groups
, ◉ In semi-micro analysis, the quantities of solution are measured in
what? Solids are measured in what? Answer: - Drops
- Solids are measured in miligrams
◉ How many drops are in 1 mL? Answer: 20 drops
◉ How many drops are in 2 mL? Answer: 40 drops
◉ What is a filtrate? Answer: It's the clear liquid above the
precipitate
◉ What is a precipitate? Answer: It's an insoluble solid form that sits
on the bottom
◉ What is a centrifuge? Answer: A spinning device which separates
suspensions (a suspension is a heterogeneous mixture of a finely
distributed solid in a liquid)
◉ What do you add to form a precipitate? Answer: A test reagent
◉ What are the steps for precipitate completion? Answer: 1) Add a
test reagent to form a precipitate
