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April 21, 2014

Homework Help: Science

Posted by Mary on Tuesday, October 25, 2011 at 10:41pm.

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.

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