Salim added 1 g of salt to each of four beakers filled with water. He stirred the water at different speeds, and recorded how long it took for the salt to dissolved.

Stirring - Time (sec)
No stirring - 25
Slow stirring - 18
Medium stirring - 10
Fast stirring - 6

Which conclusion should Salim draw?

a) Salt will not dissolve in water unless the water is stirred.
b) Stirring water increases the rate at which a salt dissolves.
c) Stirring water decreases the rate at which a salt dissolves.
d) Stirring has no effect on the rate at which a salt dissolves.

To determine the conclusion that Salim should draw, let's analyze the data provided.

Salim conducted an experiment where he added 1 g of salt to each of the four beakers filled with water. The only difference between the beakers was the speed at which the water was stirred. Salim recorded the time it took for the salt to dissolve in each scenario.

Based on the data, we can observe that the time it took for the salt to dissolve decreased as the speed of stirring increased. The salt dissolved in 25 seconds with no stirring, 18 seconds with slow stirring, 10 seconds with medium stirring, and just 6 seconds with fast stirring.

From this analysis, we can conclude that Salim should draw option b) Stirring water increases the rate at which a salt dissolves. The data clearly shows that as the speed of stirring increased, the time it took for the salt to dissolve decreased. This indicates that stirring water increases the rate at which a salt dissolves.

Therefore, Salim can conclude that when it comes to dissolving salt in water, stirring does have an effect and increases the rate at which the salt dissolves.