Testing, Mixtures and Separation Flashcards
What is a Compound?
A substance that is chemically combined
What is a Mixture?
A substance that is physically combined
Dissolve
Mixes into the water, or another solvent, forming a solution
Solution
A mixture in which the particles of the different substances cannot be seen, and cannot be separated by filtration
Solvent
A liquid that dissolves a solute
Solute
the dissolved substance in a solution
Dilute
A small amount of solute in a large amount of solvent
Concentrated
A large amount of solute in a small amount of solvent
Dilution
Adding more Solvent to a set amount of solute (Making a solution more liquidy or runny)
Saturation
Saturated refers to a point of maximum concentration, in which no more solute may be dissolved in a solvent.
Magnetic Separation
Metals are attracted by magnets
Filtration Separation
Separating a liquid from a dissolved solid
Describe how evaporation worlks in a scientific experiment
Evaporation is used to separate a dissolvable solid from a liquid
What substance is removed during evaporation?
The solvent is removed, leaving the soluble solid
Distillation separation
Distillation can be used to separate a soluble substance from water when we want to retain the water
What Physical property does distillation use for separating substances?
Distillation uses the chemical property of different evaporation points
Chromatography Separation
As the solute soaks up the paper, it carries the mixtures with it. Different components of the solution will move at different rates.
What is the physical properties of Hydrogen?
Odorless, Colourless
What is the physical properties Oxygen?
Odorless, Colourless
What is the physical properties of Carbon Dioxide?
Odorless, Colourless
How is Hydrogen gas produced in the lab?
Hydrogen and only zinc reaction
How is Oxygen produced in the lab?
hydrogen peroxide OR water and oxygen
How is Carbon Dioxide produced in the lab?
Acid and Carbonate
How do you test for Hydrogen Gas?
Light a matchstick in a test tube
How do you test for Oxygen Gas?
Get a glowing splint and put it in the substance that has hydrogen peroxide
How do you test for Carbon Dioxide?
Lime water solution (Hydroxide solution)
What is the result of a positive test for Hydrogen?
Will hear squeaky pop
What is the positive result of a positive test for Oxygen?
The matchstick will glow and make a flame
What is the positive result for Carbon Dioxide?
Turns cloudy or milky
