Concentration in mol/dm³ | GCSE Chemistry Practice
Concentration tells you how much of a solute is dissolved in a certain volume of solution.
Calculate the concentration if 0.5 moles are dissolved in 250cm³.
What is Concentration in mol/dm³ | Practice?
"The amount of solute (in moles) dissolved in a given volume of solvent (usually 1 dm³)."
Calculate the relative formula mass (Mr) of H2O. (H=1, O=16)
Calculate the mass of 0.25 moles of Calcium Carbonate (CaCO3). (Mr=100)
How many moles are in 36g of water? (Mr of H2O = 18)
Solution Strength
Concentration ($mol/dm^3$) = Moles / Volume ($dm^3$).
To convert $cm^3$ to $dm^3$, divide by 1000.
Concentration can also be measured in $g/dm^3$.
Math Rule: Always check your units! If the volume is in $cm^3$, you MUST convert to $dm^3$ before using the mole formula.
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