Many type of world reap a cold glass of iced tea on a hot summer day. Some prefer it unsweetened, while others prefer to put sugar in it. How rapid the sugar liquified relies on several factors: just how much sugar was put in the tea and also just how cold it is? You usually need to stir the tea for a while to obtain all the sugar liquified.

You are watching: Why do we crush solids before putting them into a solvent?


Rate of Dissolving

We understand that the disaddressing of a solid by water counts upon the collisions that happen between the solvent molecules and the pshort articles in the solid crystal. Anypoint that deserve to be done to boost the frequency of those collisions and/or to provide those collisions more power will boost the price of disfixing. Imagine that you were trying to dissettle some sugar in a glassful of tea. A packet of granulated sugar would dissolve quicker than a cube of sugar. The rate of disresolving would certainly be increased by stirring, or agitating the solution. Finally, the sugar would disdeal with quicker in warm tea than it would in cold tea.

Surchallenge Area

The price at which a solute dissolves relies upon the dimension of the solute pposts. Dissolving is a surchallenge phenomenon since it depends on solvent molecules colliding via the external surconfront of the solute. A given amount of solute dissolves quicker when it is ground right into small pshort articles than if it is in the create of a big chunk bereason even more surconfront location is exposed. The packet of granulated sugar exposes much more surconfront area to the solvent and dissolves more conveniently than the sugar cube.

Agitation of the Solution

Disresolving sugar in water will certainly happen even more conveniently if the water is stirred. The stirring enables fresh solvent molecules to continually be in call via the solute. If it is not stirred, then the water right at the surchallenge of the solute becomes saturated via liquified sugar molecules, interpretation that it is more tough for added solute to dissolve. The sugar cube would certainly eventually dissolve because random motions of the water molecules would lug sufficient fresh solvent into contact with the sugar, but the process would take much much longer. It is important to realize that neither stirring nor breaking up a solute influence the all at once amount of solute that dissolves. It only affects the price of disresolving.

See more: What Does “I'M Going To Chew You Up And Spit You Out ” Mean?

Temperature

Heating up the solvent offers the molecules even more kinetic power. The even more quick motion means that the solvent molecules collide via the solute through better frequency and the collisions take place with even more force. Both determinants boost the rate at which the solute dissolves. As we will certainly view in the next area, a temperature change not only affects the price of dissolving, but additionally affects the amount of solute that dissolves.


Practice

Watch the video at the link below and also answer the following questions:

http://www.youtube.com/watch?v=TO42FOay7rg

Did the sugar dissettle faster in the hot water or the cold water?What would be an additional experiment comparable to this one that would study the result of ppost dimension on the rate of dissolving?What experiment might you perform that would certainly test all three factors?

Review

What is the partnership between surchallenge area and also rate of dissolving?How does stirring affect the rate of dissolving?How does temperature influence the price of dissolving?