19,916
edits
Changes
no edit summary
==Key Stage 2==
===Meaning===
[[Concentration]] is how [[dilute]] or '''concentrated''' a [[solution]] is.
===About Concentration===
: When orange juice is added to [[water]] if there is a lot of water but not much orange juice then the [[solution]] is [[dilute]]. If there is a lot of orange juice, but very little water then it is '''concentrated'''.
==Key Stage 3==
===Meaning===
[[Concentration]] is the [[ratio ]] of a [[solute]] to a [[solvent]].
===About Concentration===
: The more [[solvent]] in a [[solution]] the lower the [[concentration]].
: [[Concentration]] can have several [[unit]]s but the most common one used in science is [[Molarity]] (M).
==Key Stage 4==
===Meaning===
[[Concentration]] is the [[ratio]] of the [[mass]] of [[solute]] to the [[Volume (Space)|volume]] of [[solvent]].
===About Concentration===
: [[Concentration]] can be measured in g/dm<sup>3</sup> or mol/dm<sup>3</sup> ([[Molarity]]).
: When calculating [[concentration]] in g/dm<sup>3</sup> the [[mass]] of the [[solute]] is [[measure]]d in [[gram]]s and the [[Volume (Space)|volume]] of [[solvent]] is [[measure]]d in [[decimetres cubed]].
: When calculating [[concentration]] in mol/dm<sup>3</sup> the amount of [[solute]] is [[measure]]d in [[Mole]]s by finding the [[mass]] and the [[Relative Formula Mass|relative formula mass]] of the [[chemical]] to find out the number of [[mole]]s and the [[Volume (Space)|volume]] of [[solvent]] is [[measure]]d in [[decimetres cubed]].
===Equation===
====Concentration by Mass====
concentration (g/dm<sup>3</sup>) = <math>\frac{mass (g)}{volume (dm^3)}
Where:
: mass = The [[mass]] of the [[solute]].
: volume = The [[Volume (Space)|volume]] of [[solvent]].
====Concentration by Moles====
concentration (g/dm<sup>3</sup>) = <math>\frac{Moles (mol)}{volume (dm^3)}
Where:
: Moles = The number of [[mole]]s of the [[solute]]. Found by dividing the [[mass]] in [[gram]]s by the [[Relative Formula Mass|relative formula mass]].
: volume = The [[Volume (Space)|volume]] of [[solvent]].
===Calculating Concentration===