Mixtures Of Materials Flashcards
What does it mean to separate ?
To break up a mixture in to the substances mixed.
What does the word physically mean?
To use hands of tools to separate a mixture
What does sieving mean?
To use a tool that has small holes in it that allows certain size of grains to pass through
What does filtering mean?
To separate a liquid and substance pouring it through filter paper or mesh fabric
What does hand sorting mean?
To separate a mixture of solids by hand
What does settling mean?
To allow a substance mixed with a liquid to settle at the bottom
what does decanting mean?
to carefully tilt the container and pour off the top layer of a mixture
key concepts -a mixture consists of at least two different substances/materials mixed together.
key concept
mixtures of solid and liquid substances-we can mix a solid with a liquid once the solid is mixed in the liquid we cant see the different substances anymore.
mixtures
we can also make mixtures of two or more liquids.We can not observe the different substances anymore.
liquids can be mixed with two or more liquids
Separating mixtures-we can separate mixtures by using the methodsof _______,_____,______,________and_______.
sieving,filtering,hand sorting,settling and decanting.
key concepts-a mixture consists of at least two or more different substances/materials mixed together,separating mixtures of solids in which the different substances are visible.
the substances in such mixtures can be separated by physical means in such as sieving,filtering,hand sorting,settling and decanting.
key concepts
what does the word solution mean?
a mixture in which we can not identify the different substances.
what does dissolve mean ?
when the particles one substances spread between the particles of another substance
what does uniform mean?
it appears the same right trough the mixture
some solids substances seem to ________when we mix them with a liquid.We call these special mixtures _______.We can make a solution by mixing _______and______ such as sugar and _____.
We say the sugar in the tea has ______in the tea.The sugar particles have moved into to spaces between the liquid particles.
disappear,solutions,solid,liquid,tea,dissolved
All solutions are ______ in appearance.The solution cant be seen after mixing with a________.
uniform,liquid
key concepts-Solutions are special mixtures.
Some solutions can be made by mixing a solid and liquid together,such as sugar and water and salt and water.
Solutions are uniform in appearance and the different substances cannot be see after mixing
key concepts
what does soluble mean ??
can dissolve
what does solvent mean?
the liquid in which a substance dissolves.
what does solute mean?
the substance that dissolves in the solvent
what does insoluble mean?
Cannot dissolve
what does solubility mean?
how well a substance will dissolve
When a solute can dissolve in a solvent we say the solute is _____in the solvent
soluble
When a solute can not dissolve in the solvent we say it is _____ in the solvent.The ability of one substance to dissolve in another is called its _______
insoluble,solubility
Melting and dissolving are not the same.Substances melt when_____ is added.Only one substance is involved in melting.The solid and liquid are the same substance.
heat
what does evaporating mean?
changing from a liquid to a gas
what does crystallisation mean?
a dissolved substance changing into solid crystals again.
The substances in solutions cannot be separated by _______,________,_________,________ or _______.the solids in a solution are broken up into very small ________ that can pass through the ________ holes.
sieving,filtering,hand sorting,settling,decanting,particles,smallest
Some solutes can be _______ or ______ by evaporating the solvent.In this process,the water evaporates and salt_____ remain behind. This process is called________.
removed,separated,crystals,crystallisation.
some mixtures can be separated by _______.A special paper ,called __________ is folded and put into a ________.The mixture is poured through it.
filtering,filter paper,funnel.
what does filter paper mean?
a special paper that only allows liquids or solutions to pass through.
Key concepts-Soluble solids(solutes) can dissolve in water(solvent).
Some solids will not form a solution in water(insoluble solids)
The substances in the solutions cannot be separated by sieving,filtering,hand sorting,settling and decanting.
blah
What does the word mixture mean ?
Two or more substances that are mixed together
what does the word measure mean?
to find out the size or amount of something.
what is volume?
the amount of space something takes up
what is mass
the amount of matter in a substance.
what is a mass meter?
an instrument used to measure mass.
what is a measuring cylinder?
a instrument used to measure volume
Volume:the amount of space something takes up
is be measured by a measuring cylinder.
Liquids
ml or l
when measuring volume pour in to a measuring cylinder and make your eye is level to get an accurate reading
Mass:measure in g or kg measure or weigh solids measure mass with a mass metre (scale) make sure on flat surface scale is on 0 read by standing directly in front,looking straight at needle or pointer
mass
what is a saturated solution?
a solution with a solute which can not dissolve in the solvent anymore,leaving the undissolved substance at the bottom
what does saturated mean?
when the solution can hold no more solute
a solution is saturated when no more solute can dissolve in a given amount of solvent
key concept
what does rate mean?
how or slow something happens
temperature affects the rate of dissolving-the temperature has one of the factor that has the biggest effect on the solute’s rate at dissolving.
in a heated solvent the particles of the solute move faster than in a cooler solvent.It allows particles to disperse through the solution more easily
temperature
Stirring the mixture affects the rate of dissolving:Stirring and shaking affect the rate of dissolving.Stirring causes the particles from the solute to spread through the solvent’s particles more quickly.
affects
Grain size of the solute: The grain size of the solute affects the rate at which it will dissolve in to a liquid.cube-take longer to dissolve,particles first need to free themselves. When the grains are loose they break up in to particles more quickly.Their particles ca spread between the water’s particles much sooner.
grains need to be broken up if in a cube
Factors such as temperature of the mixing,stirring,shaking and the grain size of the solute affect the rate of dissolving
key concept
