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Tutor profile: Sebastian M.

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Sebastian M.
Researcher in Battery Chemistry
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Questions

Subject: Inorganic Chemistry

TutorMe
Question:

What is a chelate ligand and what differentiates it from common ligands? Name one example for one chelate ligand and three for common ligands for metal complexes in aqueous solution.

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Sebastian M.
Answer:

A chelate ligand has multiple complexing sites within one molecule while a non-chelate ligand has only one. The advantage of a chelate ligand is that additional entropy is generated by replacing ligands with only one coordinating site. Example chelate ligand: $$EDTA^{-4}$$ (Ethylenediaminetetraacetic acid) Examples common ligand: $$NH_3, CO, Cl^-$$

Subject: Chemistry

TutorMe
Question:

Name the difference between a chemical reaction and a redox-reaction. Name an appropriate example for each type!

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Sebastian M.
Answer:

In a chemical reaction, the reactants do not change their oxidative state. In a redox reaction, the oxidation state of the reactants changes. Example reaction: $$HCl + NaOH \longrightarrow NaCl + H_2O$$ Example redox: $$2 HCl + 2 Na \longrightarrow 2 NaCl + H_2$$

Subject: Basic Chemistry

TutorMe
Question:

What rules are described by the "law of conservation of mass" in chemistry, specifically in chemical reactions?

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Sebastian M.
Answer:

That matter cannot be created or destroyed. In a chemical reaction partaking elements can be lost, nor can additional elements appear in the process.

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