Elements, compounds and mixtures
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
What are the three states of matter
Solid, liquid and gas
What are the physical properties of solids
• high density • cannot be compressed • fixed shape • cannot diffuse • doesn’t exert any pressure
What are the physical properties of a liquid
• fairly high density • cannot be compressed • takes up shape of the bottom of the container • can diffuse • can exert some pressure
Physical properties of gases
• low density • can be compressed • no fixed volume or shape • can diffuse • exert a lot of pressure
How do you get from a solid to a liquid and what is the name of the process
Melting - heat up the solid
How do you get from a liquid to a solid and what is the name of the process
freezing - cooling down the liquid
How do you get from a liquid to a gas and what is the name of the process
evaporation/boiling - heat up the liquid
How do you get from a gas to a liquid and what is the name of the process
Condensing - cool down the gas
How do you get from a solid to a gas and what is the name of the process
Sublimation - heat up the solid
How do you get from a gas to a solid and what is the name of the process
sublimation - cooling down the gas
Explain the reasoning behind the bromine diffusion experiment
the bromine diffuses up against gravity and filled the containers evenly. The bromine particles moved via collisions with each other
What is a solvent
The liquid that does the dissolving
What is a solute
The solid that dissolves
What is a solution
A mixture that is made when a solute dissolves into a solvent
What is a saturated solution
A saturated solution can dissolve no more solute in that amount of solvent AT THAT TEMPERATURE
What does the term solubility in the units g per 100 g of solvent mean
The solubility of a solute in H2O at a given temperature is the maximum amount of it that it will dissolve in 100g of H2O at that temperature
element definition
A substance that contains one type of atom only. it cannot be broken down into anything simpler
compound definition
A substance that contains 2 or more different atoms CHEMICALLY BONDED
Mixture definition
a substance that contains 2 or more different atoms NOT chemically bonded
Atom definition
The smallest part of an element that can exist on its own and has the characteristics of that element
What does filtration separate
Separating an insoluble solid from a liquid
What does evaporation/cyrstallisation separate
separating a soluble solute from a solution
What does simple distillation separate
Separates a solvent from its solution
What does fractional distillation separate
separates different liquids from a mixture of liquids