Transcribed Image Text: Question 2 a) The coordinated water molecules in complexes such as [M(OH2)6]n+ are generally better Bronsted-Lowry acids than free water molecules. Explain why ts is so. b) Likewise,

Excerpt
questions. i) What species are in the water at pH 10? ii) Determine expressions for ai in terms of ct and in terms of Ka for carbonic acid iii) Estimate the acid dissociation constant (Ka) value for the reaction: HCO3° = CO32- + H+ Fraction

Transcribed Image Text: Question 2
a)
The coordinated water molecules in complexes such as [M(OH2)6]n+ are
generally better Bronsted-Lowry acids than free water molecules. Explain why
ts is so.
b)
Likewise, discuss how making the following changes to the complex
would affect its acidity.
i)
Increasing the ionic radius of M
ii)
Increasing the value of n
iii) Replacing one of the complexed water molecules with an ammonia ligand
forming [M(OH2)5NH3]n*. Transcribed Image Text: The biological systems of various marine life forms may be affected by
the pH of the sea water. Figure 2 is a sketch of the speciation diagram of
carbonic acid system in sea water.
c)
0.8
HCO
co 2-
0.6.
0.4
0.2
4
6
8
10
12
14
pH
Figure 2: Speciation Diagram for carbonic acid
Use the information from Fig 2 to answer the following questions.
i)
What species are in the water at pH 10?
ii)
Determine expressions for ai in terms of ct and in terms of Ka for
carbonic acid
iii)
Estimate the acid dissociation constant (Ka) value for the reaction:
HCO3° = CO32- + H+
Fraction

Need your ASSIGNMENT done? Use our paper writing service to score better and meet your deadline.


Click Here to Make an Order Click Here to Hire a Writer