CLASS 10 · LEARNING KNOWLEDGE
Amount concentration – basic principles and applications
How it works
The amount concentration (c) indicates how many moles of a dissolved substance are contained in one liter of solution. It is given in mol/L. The calculation is done with c = n/V, where n is the amount of substance in moles and V is the volume of the solution in liters. The amount concentration is important for chemical reactions in solutions because it influences the reaction conditions. Converting between mass, amount of substance, and concentration requires the molar mass (M).
Note
The amount concentration is calculated with c = n/V. To determine n, n = m/M is used, where m is the mass in grams and M is the molar mass in g/mol. The volume V must be given in liters.
The amount concentration is calculated with c = n/V. To determine n, n = m/M is used, where m is the mass in grams and M is the molar mass in g/mol. The volume V must be given in liters.
An example
How large is the amount concentration if a solution contains 0.5 mol sodium chloride and has a volume of 2.0 L?
c = n/V = 0.5 mol / 2.0 L = 0.25 mol/L. The concentration is 0.25 mol/L.
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50 Exercises
To the learning unit →Own explanation and own practice exercises by AmyMath. Subject reference framework: Chemistry. The topic assignment may vary by federal state.