Reaction Stoichiometry in Solutions Acid-Base Titrations

3 Reaction Stoichiometry in Solutions Acid—Base Titrations 

Most chemical reactions that occur on the earth s surface, whether in living organisms or among inorganic substances, take place in aqueous solution. Chemical reactions carried out between substances in solution obey the requirements of stoichiometry discussed in Chapter 2, in the sense that the conservation laws embodied in balanced chemical equations are always in force. But here we must apply these requirements in a slightly different way. Instead of a conversion between masses and number of moles, using the molar mass as a conversion factor, the conversion is now between solution volumes and number of moles, with the concentration as the conversion factor. 

For instance, consider the reaction that is used commercially to prepare elemental bromine from its salts in solution  

Suppose there is 50.0 mL of a 0.0600 m solution of NaBr. What volume of a 0.0500 M solution of CI2 is needed to react completely with the Br To answer this, find the number of moles of bromide ion present  

Finally, find the necessary volume of aqueous chlorine 1.50 X 10 mol 

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