Molarity - Revision history

NRJC: /* Equation */

2019-01-12T11:34:50Z

‎Equation

NRJC at 11:33, 12 January 2019

2019-01-12T11:33:24Z

NRJC at 11:45, 5 December 2018

2018-12-05T11:45:47Z

NRJC at 11:45, 5 December 2018

2018-12-05T11:45:34Z

NRJC at 11:44, 5 December 2018

2018-12-05T11:44:51Z

NRJC: Created page with "==Key Stage 3== ===Meaning=== Molarity is the units of concentration of a solution. ===About Molarity=== : Molarity is shortened with an upper case M. : B..."

2018-12-02T18:25:24Z

Created page with "==Key Stage 3== ===Meaning=== Molarity is the units of concentration of a solution. ===About Molarity=== : Molarity is shortened with an upper case M. : B..."

New page

==Key Stage 3==
===Meaning===
[[Molarity]] is the [[unit]]s of [[concentration]] of a [[solution]].

===About Molarity===
: [[Molarity]] is shortened with an upper case M.
: Bottles containing [[acid]] and [[alkali]] usually have their [[Molarity]] stated on the side. The more [[concentrated]] the higher the [[molarity]].
: The [[molarity]] of [[Stomach Acid]] is around 0.16M.
: The [[molarity]] of [[Battery Acid]] can be as much as 5.2M.

@@ Line 27: / Line 27: @@
 : volume = The [[Volume (Space)|volume]] of [[solvent]].
+===Calculating Molarity===
 {| class="wikitable"
 |-
 | style="height:20px; width:300px; text-align:center;" |117g of [[NaCl]] is [[dissolve]]d in 0.5dm<sup>3</sup> of [[water]]. Calculate the [[concentration]] in g/dm<sup>3</sup>.
 | style="height:20px; width:300px; text-align:center;" |28g of [[KOH]] is [[dissolve]]d in 100ml of [[water]]. Calculate the [[concentration]] in g/dm<sup>3</sup>.
-| style="height:20px; width:300px; text-align:center;" |73g of [[HCl]] is [[dissolve]]d in 400ml of [[water]]. Calculate the [[concentration]] in g/dm<sup>3</sup>.
+| style="height:20px; width:300px; text-align:center;" |7.3g of [[HCl]] is [[dissolve]]d in 400ml of [[water]]. Calculate the [[concentration]] in g/dm<sup>3</sup>.
 |-
 | style="height:20px; width:200px; text-align:left;" |
@@ Line 65: / Line 65: @@
 | style="height:20px; width:200px; text-align:left;" |
 '''Find the number of [[mole]]s.'''
-[[mass]] = 73g
+[[mass]] = 7.3g
 [[Relative Formula Mass]] = 36.5g
@@ Line 73: / Line 73: @@
 Number of [[Mole]]s = <math>{\frac{m}{M_r}}</math>
-Number of [[Mole]]s = <math>{\frac{73}{36.5}}</math>
+Number of [[Mole]]s = <math>{\frac{7.3}{36.5}}</math>
-Number of [[Mole]]s = 2mol
+Number of [[Mole]]s = 0.2mol
 |-
 | style="height:20px; width:300px; text-align:left;" |
@@ Line 118: / Line 118: @@
 '' '''concentration (mol/dm<sup>3</sup>)''' '' = <math>\frac{mass (g)}{volume (dm^3)}</math>
-'' '''concentration''' '' = <math>\frac{2}{0.4}</math>
+'' '''concentration''' '' = <math>\frac{0.2}{0.4}</math>
-'' '''concentration''' '' = 5mol/dm<sup>3</sup> = 5M
+'' '''concentration''' '' = 0.5mol/dm<sup>3</sup> = 5M
 |}

@@ Line 1: / Line 1: @@
 ==Key Stage 3==
 ===Meaning===
-[[Molarity]] is the [[unit]]s of [[concentration]] of a [[solution]].
+[[Molarity]] is a[[unit]] of [[concentration]] of [[solution]]s.
 ===About Molarity===
@@ Line 9: / Line 9: @@
 : The [[molarity]] of [[Stomach Acid]] is around 0.16 '''Molar''' (0.16M).
 : The [[molarity]] of [[Battery Acid]] can be as much as 5.2 '''Molar''' (5.2M).

@@ Line 4: / Line 4: @@
 ===About Molarity===
-: [[Molarity]] is shortened with an upper case M.
+: [[Molarity]] is shortened with an upper case '''M'''.
 : When [[molarity]] is used to describe a [[solution]] it may be referred to as '''molar''', eg. a 0.5 '''molar''' [[solution]] of [[Sodium Chloride]].
 : Bottles containing [[acid]] and [[alkali]] usually have their [[Molarity]] stated on the side. The more [[concentrated]] the higher the [[molarity]].
 : The [[molarity]] of [[Stomach Acid]] is around 0.16 '''Molar''' (0.16M).
 : The [[molarity]] of [[Battery Acid]] can be as much as 5.2 '''Molar''' (5.2M).