A-LEVEL CHEMISTRY: 3.2.2: Group 2 (ChemRevise) Flashcards
As you go down Group 2, Atomic Radius ___. Why?
Increases.
Because number of Shells Increases
Explain the Trend in Melting Point own Group 2. (5)
Decrease.
-number of Shells Increases. Atomic Radius Increases. Shielding Increases.
-Nuclear Charge Increases.
-Electrostatic Forces of Attraction between +ve Metal Ions & -ve Delocalised Electrons Decreases.
-Weaker Metallic Bonds, require less Energy to break. MP Decreases.
Explain the Trend in Reactivity down Group 2. (5)
Increases.
-Group 2 Atoms React by Losing Electrons
-number of Shells Increases, Atomic Radius Increases, Shielding Increases.
-Nuclear Charge Increases
-weaker Electrostatic Forces of Attraction between Nucleus & outer Electrons ∴ easier to lose.
The Group 2 Metals Will Burn in ___. They burn with…
Oxygen.
Bright Coloured Flames.
Equation for Reaction between Mg and O.
What is Observed?
2Mg + O2 —–> 2MgO
Bright White Light.
Explain Reaction between Group 2 Metal & Cold Water: (4)
-Fizzing (Increases down the Group)
-Metal Dissolving (Faster down the Group)
-Solution Heats Up (Increases down the Group)
-Precipitate Forming (Decreases down the Group)
Titanium is Extracted by Reaction with a ___ ___ Metal. eg:
More Reactive.
eg: Magnesium.
Why Can’t you Extract Titanium with Carbon?
Because instead of Displacing it, Titanium Carbide (TiC) is Formed.
What can be used to remove SO2 from Waste Gases?
Calcium Oxide.
As you go down Group 2, the Solubility of Group 2 Hydroxides ___.
Increases.
All Group 2 Hydroxides, when not Soluble, appear as…
White Precipitates.
As you go Down Group 2, the Solubility of Group 2 Sulfates ___.
Decreases.
