When propanoic acid reacts with methanol, $\text{CH}_3\text{OH}$, an ester is produced. Name the ester formed and draw its displayed formula.
Propanoic acid is a weak acid. $\text{CH}_3\text{CH}_2\text{COOH} + \text{H}_2\text{O} \rightleftharpoons \text{CH}_3\text{CH}_2\text{COO}^- + \text{H}_3\text{O}^+$ Explain how this equation shows that: • $\text{CH}_3\text{CH}_2\text{COOH}$ is an acid by referring to proton transfer • $\text{CH}_3\text{CH}_2\text{COOH}$ is a weak acid.
Propanoic acid reacts with magnesium. Name both products of this reaction.
Magnesium is a solid at room temperature. Describe the motion and separation of the particles in a solid.
Fig. 7.1 presents the simplified structures of two molecules that react to make a polyamide. Complete Fig. 7.2 to show the structure of two repeat units of this polyamide. Show every atom and every bond in the linkages.
Polyamides are polymers. State what is meant by the term polymer.
Polyamides are condensation polymers. State one way in which condensation polymerisation differs from addition polymerisation.