Viscosity
What is the definition of viscosity?
The property of how fast fluids flow.
What is the definition of density?
The amount of matter in a given volume.
Define solute.
What is being dissolved.
The opposite force to gravity that pushes up on an object is called what?
Buoyant force.
What two categories is all matter separated into?
Slow
The density of a fluid depends on the _____________ it is made up of.
particles.
What is considered the universal solvent?
Water
What happens when the density of the liquid is greater than the density of the object placed in it?
The object will float.
What is an example of a pure substance?
Any element (silver, gold, oxygen, iron, etc.) or any compound (water, sugar, salt, baking soda, etc.)
If a fluid was heated how does it affect the viscosity?
Becomes less viscous.
When a fluid is heated it causes the volume to increase but the number of particles stays the same, how does this change the density?
The density decreases.
How can you increase the solubility of a solution?
-stir the solution
-increase the surface area of the solute
-increase the temperature
(only need to get one)
What is one place that we see buoyancy in our lives?
A mixture where you cannot tell the different substances apart is called what?
A homogeneous mixture (solution)
Viscosity is determined by a fluid's what?
Internal resistance or friction.
How can one substance have different densities?
Different temperatures cause different states of matter.
What is a saturated solution?
A solution in which no more solute can dissolve at a given temperature.
What type of buoyancy does an object have if it doesn't either sink or float?
Neutral buoyancy.
Give an example of a heterogeneous mixture.
Mixed nuts, cement, sand, raisin bread, etc.
How does viscosity relate to the particle model of matter?
Viscosity depends on the attraction between particles and the space between particles.
An unknown substance has a mass of 7g and a volume of 16ml. What is it's density?
0.4375g/ml
Why are some solutes insoluble?
The solute particles are more attracted to each other than to the solvent.
How are buoyancy and density related?
The more dense a substance is the more particles there are per volume; which causes higher buoyant force.
Food colouring in water is an example of what kind of mixture?
Homogeneous mixture.