Question

A student pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. She then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. The student performs the experiment one more time but this time she stirs the mixture rapidly.

In order to get the best results, the student should:

Answer 1

In order to get the best result, the student should heat the salt water mixture gently.
Application of heat will increase the amount of the kinetic energy that is available to the molecules of the salt, the particles will be moving faster and in the process they will dissolve faster. Application of heat will make the water molecules too to gain energy and take in more salts more rapidly.