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Chapter 7: Problem 46

What happens to the volume of a sugar solution as more sugar is dissolved in it?

Short Answer

Expert verified
The volume increases slightly but not directly in proportion to the sugar added.

Step by step solution

01

Understand the Principle of Dissolution

When sugar is added to water and dissolves, the sugar particles fill the spaces between the water molecules. The solution's overall volume does not increase as much as the volume of sugar added due to the sugar molecules fitting in between water molecules.
02

Observe Impact on Volume

As more sugar dissolves, the solution's volume may increase slightly, but not in direct proportion to the amount of sugar added. The solution鈥檚 volume typically increases by less than the total volume of sugar added.
03

Consider Solubility Limits

The degree to which sugar can dissolve in water is finite. Once the solution reaches its saturation point, no more sugar can dissolve and any additional sugar will remain undissolved.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Volume of Solution
When we talk about the volume of a solution, we refer to the total space that all the components of the mixture occupy.
In our exercise, as sugar dissolves in water, the sugar molecules occupy spaces between the water molecules.
This means that although you're adding more sugar to the water, the increase in the overall volume of the solution is not as large as you might expect.
Why does this happen?
  • When sugar dissolves, its molecules are distributed throughout the water, filling in the gaps between water molecules.
  • This is why the volume increase is less than the actual volume of added sugar.
The balancing act between sugar and water molecules is quite fascinating and explains the observed changes in solution volume.
Saturation Point
The saturation point of a solution is a critical concept in understanding dissolution.
It refers to the maximum amount of solute (in this case, sugar) that can be dissolved in a solvent (like water) at a specific temperature and pressure.
Once this point is reached, the solution is considered 'saturated.'
What happens at saturation?
  • Up to this point, sugar will continue to dissolve as long as there is space between the water molecules.
  • At saturation, those available spaces are filled, and no more sugar can assimilate into the solution.
If you keep adding sugar beyond this point, it will just accumulate at the bottom as undissolved particles.
Understanding saturation helps us determine how much solute a solution can realistically hold.
Solubility Limits
Solubility is the inherent limit that dictates how much of a substance can dissolve in a given amount of solvent at a certain temperature.
It's like the threshold for how much salt you can add to water before it stops dissolving and starts forming a residue.
Here are the basics of solubility limits:
  • Each substance has its own solubility limit in different solvents.
  • Temperature plays a significant role 鈥� typically, the higher the temperature, the more solute can be dissolved.
  • For instance, sugar's solubility expands in warmer water compared to cold.
By knowing the solubility limits, you can better manage and predict the outcomes when mixing substances.

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