calculate the buffer capacity (BC) of your buffer solution before and after dilution with water, and enter the values obtained below. Remember that before dilution the water volume in the flask was 25 mL. After dilution, the volume was 35 mL. The number of moles of weak acid and conjugate base will depend on the amounts added to the flask. Your weak acid's molar mass is 234 and that of the conjugate base is 256.

- aluminum and copper chloride.

- the chloride ion to separate the aluminum from the oxygen so that the aluminum can react with the copper ions (and the water molecules).

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.