Changes

For [[Chemical Reaction|reaction]]s which give off a [[gas]] the [[Volume (Space)|volume]] of [[gas]] [[product|produced]] can be [[measure]]d throughout an [[experiment]] to find the '''rate of reaction'''.

For [[Chemical Reaction|reaction]]s which give off a [[gas]] the [[mass]] of [[Reaction Mixture|reaction mixture]] can be [[measure]]d throughout an [[experiment]] to find the '''rate of reaction'''.

For [[Chemical Reaction|reaction]]s in which the [[reactant]]s are in a [[transparent]] [[solution]] but the [[product]]s form an [[insoluble]] [[precipitate]] that is [[opaque]] then the [[opacity]] can be [[measure]]d.