A text-book on chemistryFor the use of schools and colleges . phuric this manner several cups are to be provided,the arrangement being zinc in contact with dilute sul-phuric acid and plati-num, in contact withstrong nitric acid,witha porous cup interven-ing between. The zinccylinder of one cellis connected with theplatinum of the nextby soldering. represents a bat-tery of six cups arranged for action. P is the positiveand N the negative pole. Groves battery owes its force to the decompositionof water by zinc. But the hydrogen is not evolvedfrom the surface of the platinum as it
A text-book on chemistryFor the use of schools and colleges . phuric this manner several cups are to be provided,the arrangement being zinc in contact with dilute sul-phuric acid and plati-num, in contact withstrong nitric acid,witha porous cup interven-ing between. The zinccylinder of one cellis connected with theplatinum of the nextby soldering. represents a bat-tery of six cups arranged for action. P is the positiveand N the negative pole. Groves battery owes its force to the decompositionof water by zinc. But the hydrogen is not evolvedfrom the surface of the platinum as it would be in a sim-ple circle; it is here taken up by the nitric acid, whichundergoes rapid deoxidation, and therefore, during theuse of this battery, volumes of deutoxide of nitrogenare evolved. A battery of fifty cups gives rise to verystriking effects, but Hxe or ten are quite sufficient to re-peat most of the following experiments. What is the most powerful of Voltaic combinations ? DescribeGroves battery. What is the source of power in Groves battery ?.
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