Question

9 Joe put 20g of salt into 100cm³ of water in a beaker. Name three ways he could speed up the

salt dissolving in the water.
[1 mark]S
[1 mark]S
[1 mark]S

Answer 1

To speed up the salt dissolving in water, Joe can increase the temperature, stir the mixture, or increase the surface area of the salt particles.

Step-by-step explanation:

1. Increasing the temperature: When Joe heats up the water-salt mixture, the kinetic energy of the water molecules increases, causing them to move faster. This increases the chances of the salt particles colliding with the water molecules, leading to faster dissolution.
2. Stirring or agitation: By stirring the mixture, Joe helps bring fresh water in contact with the salt particles. This helps to disperse the salt particles evenly throughout the water, increasing the rate of dissolution.
3. Increasing the surface area: If Joe crushes the salt into smaller particles, he increases the surface area of the salt exposed to the water. This provides more sites for water molecules to interact with the salt particles, speeding up the dissolution process.

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