Colloids and interfaces in the environment Flashcards
What are the 3 phases of matter?
Solid (definite shape and volume)
Liquid (take container shape, fixed volume)
Gases (shape and volume of container)
What 2 things can happen to substances when transitioning between phases?
Increased temp- faster particle, pushed apart
Attractive force- stickiness, pull together
What is a colloid?
Mixture of 2 phases of matter
What are some examples of colloids?
Liquid aerosols
Solid aerosols
Liquid foam
Emulsions
SOL (solid liquid)
Solid foam
Gel
Solid sol
What is a SOL? (colloid)
solid particles dispersed in a liquid
What are some examples of SOLs? (colloid)
Paint
Starch
Tea in water
Soapy water
What is a gel or solid emulsion?
continuous network of solid particles dispersed in liquid (e.g., jellies)
How will colloidal solutions appear?
milky
What is the particle diameter range in colloids?
1-1000nm
What does not happen with colloid particles?
don’t settle to bottom of container and cannot be removed by filtering
What is the Tyndall effect?
a way to distinguish a colloid from solution by shining a light through as the large particles in the colloid will scatter light
What other particles are around the size of colloids?
Smaller then bacterium
Larger then protein
Around size of virus
What does PM stand for?
particulate matter
What are the 3 main types of pm size?
10
2.5
0.1
What is the most dangerous type of pm?
0.1 as ultrafine and can make it to alveoli and into bloodstream while 10 only trachea and 2.5 bronchioles