Tutor profile: Rima M.
Subject: Organic Chemistry
Propose 2 ways by which chloro ethane can be synthesized.
Chloroethane can be produced by: 1- substitution reaction of an ethane by chlorine gas in the presence of UV light. 2- addition reaction of hydrogen chloride to an ethene.
When comparing the boiling points of halogens, we observe that it increases down a group. Justify.
Going down a group, the atomic mass increases and the size of an atom increases. The intermolecular forces existing in halogens are london dispersion forces. Although they are weak forces compared to other types like dipole-dipole and hydrogen bonding, but their strength increases when atomic size and atomic mass increases.
Subject: Basic Chemistry
When performing an acid-base titration, a student added distilled water to the erlynmeyer flask having an acid in it until it became half filled. The student claims that this step is important for titration. Do you think this step is useful or not? Justify.
This step is useful since the ions will be more dissociated and ready to react with the base and will not affect the number of moles, thus will not affect the calculation of unknown molarity.
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