Discuss the trends in atomic and physical properties of elements of Group 2. Write any four uses of LiAlH4.
Understand the Problem
The question is asking about the trends in atomic and physical properties of elements in Group 2 of the periodic table, as well as the uses of lithium aluminum hydride (LiAlH4). This involves discussing the characteristics of alkaline earth metals and identifying practical applications of LiAlH4.
Answer
Group 2 trends: increasing atomic radius; decreasing ionization energy and electronegativity. LiAlH4 uses: reducing esters, carboxylic acids, amides, ketones.
Group 2 elements show increasing atomic radius, decreasing ionization energy, and decreasing electronegativity down the group. Physical properties like melting and boiling points vary but are generally low compared to transition metals. LiAlH4 is used as a reducing agent in organic synthesis to reduce esters, carboxylic acids, amides, and ketones to alcohol.
Answer for screen readers
Group 2 elements show increasing atomic radius, decreasing ionization energy, and decreasing electronegativity down the group. Physical properties like melting and boiling points vary but are generally low compared to transition metals. LiAlH4 is used as a reducing agent in organic synthesis to reduce esters, carboxylic acids, amides, and ketones to alcohol.
More Information
Lithium aluminium hydride is a powerful agent used in transformations essential for manufacturing pharmaceuticals and fine chemicals.
Tips
A common mistake is to overlook the rising atomic radius when moving down the group.
Sources
- Lithium Aluminium Hydride- LiAlH4 - Definition, Structure ... - BYJU'S - byjus.com
- Atomic and physical properties of Periodic Table Group 2 - Chemguide - chemguide.co.uk
- Lithium aluminium hydride - Wikipedia - en.wikipedia.org
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