i) Determine the coordination number and oxidation state of platinum in the complex [Pt(en)2Cl2]. ii) Identify the complex(es) which exhibits geometrical isomerism: [Ni(CN)4]2-, [C... i) Determine the coordination number and oxidation state of platinum in the complex [Pt(en)2Cl2]. ii) Identify the complex(es) which exhibits geometrical isomerism: [Ni(CN)4]2-, [Co(NH3)6]Cl3, [Cr(en)2(NH3)2]3+, [Co(en)3]3+. iii) Explain: [Fe(H2O)6]3+ is strongly paramagnetic while [Fe(CN)6]3- is weakly paramagnetic. Which student measured the osmotic pressure of 0.5 M NaCl solution? Provide justification for your answer. Under what condition does reverse osmosis occur through a semi-permeable membrane? Calculate the concentration of K2SO4 that would be isotonic to the 0.5 M NaCl solution at 300 K. Write two examples of essential α-amino acids. Which of the following is a basic amino acid? Aspartic acid, histidine, valine, leucine. Name the α-amino acid which is optically inactive. Mention a difference between the following pair of terms: Fibrous and globular proteins. Primary and secondary structure of proteins.
Understand the Problem
The question is asking to determine various aspects of complex coordination compounds, including coordination number and oxidation state, identification of geometrical isomers, and explanations of magnetic properties. It also includes a biological experiment involving osmotic pressure and requires identifying conditions for reverse osmosis and relating osmotic pressures of different solutions. The focus is on coordination chemistry and biochemistry concepts.
Answer
i) Coord. number 6, Pt oxid. state +2. ii) [Cr(en)2(NH3)2]3+ isomerizes. iii) [Fe(H2O)6]3+ strongly paramagnetic, [Fe(CN)6]3- weakly. iv) Anuj: 0.5 M NaCl osmotic pressure. v) Reverse osmosis: pressure > osmotic. vi) K2SO4 isotonic conc. 0.167 M. vii) Essential: tryptophan, methionine. viii) Basic: histidine. ix) Inactive: glycine. x) Fibrous: structural; Primary vs Secondary: sequence vs structure.
i) Coordination number is 6, oxidation state of Pt is +2. ii) [Cr(en)2(NH3)2]3+ exhibits geometrical isomerism. iii) [Fe(H2O)6]3+ is strongly paramagnetic due to 5 unpaired electrons; [Fe(CN)6]3- is weakly paramagnetic due to pairing caused by strong field ligands. iv) Anuj measured the osmotic pressure for NaCl solution at 24.6 atm. v) Reverse osmosis occurs when applied pressure exceeds osmotic pressure. vi) Concentration of K2SO4 isotonic to 0.5 M NaCl is 0.167 M. vii) Essential amino acids: tryptophan, methionine. viii) Basic amino acid: histidine. ix) Optically inactive amino acid: glycine. x) Fibrous proteins are structural, globular proteins are functional; primary structure is amino acid sequence, secondary is 3D conformation.
Answer for screen readers
i) Coordination number is 6, oxidation state of Pt is +2. ii) [Cr(en)2(NH3)2]3+ exhibits geometrical isomerism. iii) [Fe(H2O)6]3+ is strongly paramagnetic due to 5 unpaired electrons; [Fe(CN)6]3- is weakly paramagnetic due to pairing caused by strong field ligands. iv) Anuj measured the osmotic pressure for NaCl solution at 24.6 atm. v) Reverse osmosis occurs when applied pressure exceeds osmotic pressure. vi) Concentration of K2SO4 isotonic to 0.5 M NaCl is 0.167 M. vii) Essential amino acids: tryptophan, methionine. viii) Basic amino acid: histidine. ix) Optically inactive amino acid: glycine. x) Fibrous proteins are structural, globular proteins are functional; primary structure is amino acid sequence, secondary is 3D conformation.
More Information
The coordination number reflects the number of atoms bonded to the central metal. Paramagnetism arises from unpaired electrons; strong field ligands reduce unpaired electrons in complexes like [Fe(CN)6]3-. Osmotic pressure depends on solute ionization and concentration, a principle used in determining isotonic solutions.
Tips
Common mistake: miscounting coordination numbers or oxidation states for complexes. Ensure to account for the type and number of ligand atoms bonded directly to the metal.
Sources
- Coordination number and oxidation state of platinum - toppr.com
- Isomerism in Coordination Complexes - chem.libretexts.org
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