solute and solvent
DESCRIPTION
Solute and Solvent. Mixtures and Solutions. Matter. Heterogeneous materials - can see two parts. Homogeneous materials can see only one thing - one set of properties. Homogeneous mixtures They’re mixed together so well you only see one thing – it looks pure but it isn’t. Pure substances - PowerPoint PPT PresentationTRANSCRIPT
Solute and Solvent
Mixtures and Solutions
Heterogeneous materials - can see two parts
Matter
Homogeneous materials can see only one
thing - one set of properties
Homogeneous mixtures
They’re mixed together so well you only see one thing – it looks pure
but it isn’t
Pure substancesYou can only see one thing because there is only one kind of particle in
it.
Mechanical Mixture
Solution
Review Solutions
Are solutions homogeneous or heterogeneous? Homogeneous
Are solutions mixtures or pure substances? Mixtures
What kind of states can a solution be? Solid, liquid, or gas
What are the two “s” words that every solution must have? A solute and a solvent
In a salt water solution…
Is salt the solute or the solvent? Solute
Is water the solute or the solvent? Solvent
What does the solute do? Gets dissolved
What does the solvent do? Does the dissolving
Solute (salt)
Solvent (water)
A Salt Water Solution
Factors Affecting How Fast a Solute Dissolves
1. Temperature
2. Stirring or Shaking
3. Crushing (Surface Area)
4. Pressure
1. Temperature If we heat particles they will move faster
• The solvent will carry the solute particles away faster
So…
Hotter = Dissolve Faster
2. Stirring or Shaking
Stirring or shaking a solution moves the solute particles around so that they are closer to water particles
• the water particles can then attract them easily and carry them away!
So…
Stir or Shake = Dissolve Faster
3. Crushing (Surface Area)
When a sugar cube is broken into small pieces, the individual sugar particles can get closer to water particles
• the water particles can then attract them easily and carry them away!
Dissolving happens on the surface of particles
• When solute is broken up, there is more surface area where dissolving can occur
broken up
4. Pressure
Pressure forces gas particles into the spaces between the liquid particles
Pressure is used to dissolve carbon dioxide gas in liquid pop
gas
So…
More pressure = Dissolve Faster
Exteme Example of Pressure
Altitude Sickness and Nitrogen Narcosis (“The Bends”)