Elements, Compounds and Mixtures Flashcards
The four common mixtures are?
Solutions, Colloids, Suspensions, Emulsions
What is a solution?
A mixture in which a soluble liquid or solid is dissolved in a solvent.
A mixture is made up of….?
Two or more substances
A mixture is made up of two or more substances which may be ……..or …………? Mixed in any …………?
Elements, compounds, proportions
In a solution, what is the substance being dissolved
A solute
Colloids cannot…..
Pass through semi-permeable membranes
A Solution is always …….even if coloured
clear
What are suspensions?
Suspensions are very small but visible particles of a solid suspended in a liquid. The cells form a suspension in whole blood.
What are emulsions?
Droplets of one liquid are suspended in another liquid. Bile salts act as emulsifiers to allow the dispersion of fats in the intestine.
Mixtures can be ………….. into their …………..components.
separated, original
Most matter naturally occurs as…….?
Mixtures
In a solution, the solute does not…….. out and it cannot be………. out
settle, filtered
In a solution, what dissolves a substance
a solvent
Proteins in the body form…….. mixtures.
Colloidal
What is a Colloid?
A mixture where particles are too small to be seen but big enough to diffract light.
In a mixture, the substances keep their own ……..?
Properties
Name three mixtures in the natural world?
Saline (salt water), air, most rocks
In a mixture the ……. keep their own …………….as they are not chemically …………..
substances, properties, bound
Name four common mixture types?
Solution
Emulsion
Suspension
Colloid
Solutions are always………
Clear
What are some basic examples of solutions?
Salty water
Coca-cola
Wine
Vinegar
Black tea
Solutions are always clear and can pass through……. ……. ……..(3 words)
Semi-permeable membranes
What is the definition of a suspension?
It is ……….. and …………on standing.
……..are too………..to fit through ……. ………..
Murky, settle.
Particles, large, filter paper.
Anything that says shake before use is probably a …..
Suspension
Name two examples of a suspension?
muddy water
orange juice (squeezed)
Give the definition of an emulsion?
Drops of one liquid are suspended in another.
Cloudy and may separate on standing.
e.g. vinaigrette
Many substances are made up of several kinds of mixtures.
Blood contains (name four mixture examples)?
- Solution of dissolved salts and glucose
- Proteins as colloids
- Cells as a suspension
- Emulsified fatty substances
Show the classification of matter diagram
What is an example of a colloid?
mixtures containing protein such as egg whites, milk
What is are 3 examples of a suspension?
- red blood cells in the blood
- starch mixed with water
- muddy water
Name some solutions in the body
urine
blood
tears
sweat
What is the most important solvent in the body?
Water
Solutes that dissolve in water are called……
hydrophilic or water-loving
Substances that do not dissolve in water are called
Hydrophobic or water-hating. eg oils and waxes
What types of mixtures are found in whole blood?
- Solution of salts and glucose
- Suspension of cells
- Proteins are colloids
- Fats are emulsified
What kind of mixtures are found in blood plasma?
- Solutions of salts and glucose
- proteins are colloids
- Fats are emulsified
(there is no suspension of cells)
What are particles?
They are molecules or ions
What is a pure substance?
It is made up of identical particles (molecules or ions).
eg. Water, H2O (distilled water is made up of billions of H2O particles)
Salt and glucose.
Magnesium, Potassium etc.
Define mixtures
2 or more pure substances, mixed together in any proportion.
EG, saline, blood, shampoo, milk, bleach etc
What are elements?
Elements are composed of only one kind of atom.
An element cannot be decomposed into a simpler substance.
True or false
True
