Viscosity
What is viscosity?
The property of how fast fluids flow.
What is density?
The amount of matter in a given volume.
What is a solute?
The substance being dissolved in a solution.
What is buoyant force?
The opposite force to gravity that pushes up on an object when the object is in a fluid.
Which two categories can all matter be organized into?
Pure Substances and Mixtures.
A fluid with a high viscosity would have a ________ flow rate.
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 a 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, what happens to it's viscosity?
It 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 rate of dissolving for a solution?
-stir the solution
-decrease the surface area of the solute (crush into smaller parts)
-increase the temperature
(only need to get one)
The more dense a FLUID is, the ___________ buoyant force it will apply on an object.
more/higher
A mixture where one substance is dissolved in another and you cannot tell the different substances apart is called what?
A homogeneous mixture (solution)
Viscosity is determined by what?
The fluid's internal resistance or friction.
How can one substance have different densities?
What is a saturated solution?
A solution in which no more solute can dissolve at a given temperature.
If an object floats, the buoyant force is equal to what?
The amount of water the object displaces.
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 (friction) 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 does an objects density affect it's buoyancy?
If an object is more dense, it means the particles are more tightly packed OR it has a smaller volume. This makes it LESS buoyant.
Food colouring is an example of what kind of mixture?
Homogeneous mixture.