Thecellconsists ofaposit iveelectrodeanodeandanegat

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: t displace any elements listed above them. For example Ag cannot displace any elements listed above it fro m one of its compounds. Ag (s) + CuCl2 (aq) ® No Reaction Ag (s) + HCl (aq) ® No Reaction Examples: Use activit y series to complete each reaction belo w. If no reaction occurs, write “No Reaction”. 1. Pb (s) + HCl ® 2. Zn (s) + MgCl2 (aq) ® 3. Ni (s) + CuCl2 (aq) ® 4. Mg (s) + AlCl3 (aq) ® 7 Chemistry 52 Chapter 17 ELECTROLYSIS · The process by which electrical energy is used to bring about a non­spontaneous chemical change is called electrolysis. For example water can be deco mposed to its elements through electrolysis: elec ic 2 H 2O (l) ¾c¾ter¾ 2 H 2 (g) + O 2 (g) ® u rr n t · The apparatus in which electrolys is is performed is called electrolytic cell. The cell consists of a posit ive electrode (anode) and a negat ive electrode (cathode). · In an electrolyt ic cell electricalenergy fro m the voltage source is used to bring about non­ spontaneous redox reactions. For example, the electrolysis o f HCl is shown below. · The cations migrate toward the cathode (–) and are reduced. + 2 H (aq) + 2 e- ® H2 (g) Reduction half­reaction · The anio ns migrate toward the anode (+) and are oxidized. 2 Cl- (aq) ® Cl2 (g) + 2 e- Oxidation half­reaction · The overall react ion can be obtained by adding the two half­reactions. 2 HCl (aq) ® H2 (g) + Cl2 (g) 8 Overall reaction Chemis...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online