Define the term Lewis base and give two examples. are your examples possible lig
ID: 552108 • Letter: D
Question
Define the term Lewis base and give two examples. are your examples possible ligands? why or why not?
for part 3 & 4 create a table showing observation that occurred for each step. do your observation from part 3&4 give any indication about the amphoteric nature of the compounds formed in this section? why or why not? does ammonia or NaOH provide a more conclusive demonstration of amphoterism? explain
Table 6: Observation for part 4:
Zn2+
Sn2+
Initial color
Clear
Slightly cloudy
Observation after adding 1M NH3
Slightly cloudy
Deep white cloudy
Observation after adding 6M NH3 and place it in the centrifuge
Clear
Reform cloudy white precipitate
Table 5: observation for part 3:
Zn2+
Sn2+
Initial color
Clear
Slightly cloudy
Observation after adding 1M NaOH
Slightly cloudy
Deep white cloudy
Observation after adding 6M NaOH and place it in the centrifuge
Clear
Clear
Zn2+
Sn2+
Initial color
Clear
Slightly cloudy
Observation after adding 1M NH3
Slightly cloudy
Deep white cloudy
Observation after adding 6M NH3 and place it in the centrifuge
Clear
Reform cloudy white precipitate
Explanation / Answer
the molecule that can donate electron is termed as lewis base.
example: pyridene ans 4,4'-bipyridene are exalple of two lewis base.
thay can termed as a ligand because they can donate electron to a electron defficiene metal atom. in addition 4,4'-bipyri can be catagorised as a bi dented bridging ligand.
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