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Qualitative Analysis Time Frame: Three weeks
Objectives:
By the end of this unit students will be able to do the following:
- Define the term qualitative analysis.
- Explain how ions are formed.
- Distinguish between cations and anions.
- Explain how precipitates form.
- Explain the relationship between elements in a family and the precipitates they form.
- Predict and identify precipitates formed from interactions of common cations and anions.
- Follow a flow chart to detrmine which ions are isolated through qualitative methods.
Overview of Unit
Demonstration: During class discussion students will start to investigate the properties of water that make it valuable to living things and most chemical reactions. Time will be spent having students investigate electrolytic solutions that can light a light bulb, run a clock, and glow in the dark. Students will be lead through discussion as to what they believe is causing the phenomena to appear. After listing several of their responses the teacher will start shifting their focus to target chemical energy. This discussion will lead back to the fundamental particles of the atom and focus on the electrons and the formation of ions. Students will be able to see first hand charged particles through demonstrations; the cathode ray tube and the Van de Graff generator. Students will experience physical changes that will help them detect chemical changes in solutions through qualitative analysis. Once the students have a grasp for how ions form and combine the testing needed to be done for the water sample can be explained.
Start Inorganic Nomenclature.
- Divisions of the periodic table: metals, nonmetals and metalloids.
- Naming Representative Anions.
- Naming Representative Metals.
- Naming Transition Metal.
- Naming Polyatomic Ions
- Naming acids
Reinforcement with plenty of homework.
At the beginning of the second week the introduction of the lab portion will happen . A systematic combination of ions is conducted using salt solutions and identifying precipitates.Writing Formulas for Inorganic
- Determining Charges for Cations
- Determining Charges for Anions
- Charges for polyatomic ions
- Balancing compounds by charge
Reinforcement with plenty of homework.
Test