Demonstrating Chemistry - Spectacular Experiments: Sodium Ethanoate Stalagmite

The video tutorial explains the process of crystallization using sodium ethanoate. It begins with an introduction to sodium ethanoate and the concept of nucleation sites. The tutorial then demonstrates how to seed crystals to initiate crystallization, which is a self-perpetuating process that generates heat, similar to hand warmers. Finally, it covers the preparation of a supersaturated solution of sodium ethanoate, emphasizing the importance of avoiding dust to prevent premature crystallization.

What is the purpose of seeding crystals of sodium ethanoate onto a watch glass?

• To dissolve the crystals completely

• To provide nucleation sites for crystallization

• To prevent the solution from boiling

• To cool down the solution

What happens once the crystallization of sodium ethanoate starts?

• It requires constant stirring

• It needs additional heat to continue

• It can be easily stopped

• It becomes self-perpetuating

How is heat related to the crystallization of sodium ethanoate?

• It absorbs heat from the surroundings

• It releases heat during crystallization

• It requires external heat to start

• It remains at room temperature

What is the first step in preparing a supersaturated solution of sodium ethanoate?

• Adding sodium ethanoate to cold water

• Cooling the solution immediately

• Adding dust to the solution

• Boiling 130 ml of water

Why is it important to keep a watch glass on top of the solution during cooling?

• To avoid dust causing nucleation

• To prevent evaporation

• To speed up the cooling process

• To allow more sodium ethanoate to dissolve