Useful procedures for calculations involving molar concentrations

1 Useful procedures for calculations involving molar concentrations 

The same relationship can be used to qalculate the concentration of a solution containing a known amount of a solute, e.g. if 21.1 g of NaCI were made up to a volume of 100 ml (0.1 L), this would give  

Dilutions and concentrations. The following relationship is very useful if you are diluting (or concentrating) a solution  

Thus l a lobo mL (in other words, you would have to add water.to 200mL of 0.5mol L NaCI to give a final volume of 1000 mL to obtain a 0.1 mol L solution)  

Interconversion. A. simple way of interconverting amounts and volumes of any.partlcular solution is to divide the amount and volume by. a factor of 10 thus a molar solution of a substance contains 1 molL which is equivalent to IrrimolmL , or 1/zmol L S or 1 nmolnL etc. You may find this technique useful when calculating th e amount of substance present in a small volume of solution of known coricentration, e.g. to calculat the amount of NaCI present in 50/iL of a solution with a concentration (molarity) of 0.5molL NaCI  

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Box 6.1 Useful procedures for calculations involving molar concentrations... 

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