Why do you add water after the initial reaction between salicylic acid and acetic anhydride has completed?

A student carrying out the aspirin synthesis as described in the lab manual started with 1.92 g of salicylic acid and reacted it with 2.50 mL of acetic anhydride (density = 1.082 g/mL) and 5 drops of 18 M sulfuric acid. What are the amounts of salicylic acid and acetic anhydride reacting?

A student carrying out the aspirin synthesis as described in the lab manual started with 1.93 g of salicylic acid and reacted it with 2.5 mL of acetic anhydride (density = 1.082 g/mL) and 5 drops of 18 M sulfuric acid. What is their expected (theoretical) yield of aspirin?

How should the Hirsch funnel be positioned?

Once you have the Hirsch funnel seated in the rubber square what do you do next?

The technique of dissolving an impure solid in the minimum amount of hot solvent, cooling the solution and filtering off the solid is called what? And what is the aim of this technique?

A student carrying out the aspirin synthesis as described in the lab manual started with 1.95 g of salicylic acid and reacted it with 2.5 mL of acetic anhydride (density = 1.082 g/mL) and 5 drops of 18 M sulfuric acid. What is their expected (theoretical) yield of aspirin?

A student carrying out the aspirin synthesis as described in the lab manual started with 1.97 g of salicylic acid and reacted it with 2.50 mL of acetic anhydride (density = 1.082 g/mL) and 5 drops of 18 M sulfuric acid. What are the amounts of salicylic acid and acetic anhydride reacting?

The recrystallisation temperature lies within which temperature range?

Cold rolled brass is cut into different samples and they are heated for one hour at various temperatures, and their strengths tested, as given in the table below. The recovery temperature lies within which temperature range?