| How can you make something more Concentrated? | -If you add more Solute which will then Dissolve, then its more Crowded and therefore making the Solution more Concentrated |
| What is the Formula for Concentration? | Concentration = Mass of Solute / Volume of Solution |
| 25g of Copper Sulphate is Dissolved in 500 cm₃, What's the Concentration? | -500cm₃ = 0.5dm₃ and then use Substitution
-25/0.5 --> 50g/dm₃ |
| How can you change the Concentration from g/dm₃ to mole/dm₃? | -Simply divide the Concentration [g/dm₃] by the Relative Formula Mass to get Concentration in mol/dm₃ |
| What is a Standard Solution? | -This is simply a Solution that you already know the Concentration. |
| Make 250cm₃ of a 314g/dm₃ Solution of Sodium Chloride | -First, find out how many Grams of Solute you need by the Rearranging Formula: Mass= Conc x Volume [314dm₃ x 0.25dm₃]
-Now weigh this Mass by pouring the Solution into an Empty Beaker onto a Mass Balance
-Then add some Deionised Water, and Stir, until the Solute has Dissolved
-Then pour your Solution into a Volumetric Flask, and also add Deionised Water to the Beaker and Stirring Rod to Rinse it out
-Top off the Flask with Deionised Water until it reaches 250cm₃, and then Mix it, and there we go, a Solution with 250cm₃, with that Concentration :) |
| When making a Standard Solution, what do you do if the Concentration is in Mol/dm₃? | -Simply find out how many Moles of Solid you need [Solute] and then Convert it to Grams [Mass= Moles x Atomic Mass or Relative Mass] |
