Pure Chemistry Archives - Page 2 of 14 - Study notes, tips, worksheets, exam papers

List down the three acidic chemical properties.

16/11/2023 at 3:56 pm (last edited 16/11/2023 at 3:56 pm)

Acids react with reactive metals to form hydrogen and salt.
Acids react with carbonates to form a salt, carbon dioxide and water.
Acids react with bases to form a salt and water only (neutralization).

Draw the repeat unit of Terylene.

14/11/2023 at 2:11 pm (last edited 14/11/2023 at 2:11 pm)

Draw the repeat unit of nylon.

14/11/2023 at 2:09 pm (last edited 14/11/2023 at 2:09 pm)

Draw 2 repeat units of the addition polymer, poly(propene).

14/11/2023 at 2:07 pm (last edited 14/11/2023 at 2:07 pm)

List the conditions for esterification.

14/11/2023 at 2:01 pm (last edited 14/11/2023 at 2:01 pm)

Gentle warming
Catalyst: a few drops of concentrated sulfuric acid

List the conditions for fermentation of glucose solution.

14/11/2023 at 1:57 pm (last edited 14/11/2023 at 1:58 pm)

Temp 37 deg C
Absence of oxygen
Biological enzyme: yeast

List the conditions for hydration of alkenes.

14/11/2023 at 1:55 pm (last edited 14/11/2023 at 1:55 pm)

Temp 300 deg C
Pressure 60 atm
Catalyst: Phosphoric(V) acid, H₃PO₄

List the conditions for hydrogenation of alkenes.

14/11/2023 at 1:52 pm (last edited 14/11/2023 at 1:52 pm)

Temp 200 deg C
Catalyst: nickel

List the conditions for substitution reaction of alkanes.

14/11/2023 at 1:49 pm (last edited 14/11/2023 at 1:49 pm)

Presence of UV light.

List the conditions for catalytic cracking of long chain alkanes.

13/11/2023 at 12:47 pm (last edited 13/11/2023 at 12:48 pm)

Temp 600 deg C
Catalyst: aluminium oxide or silicon (IV) oxide