A galvanic cell is based on the following half-reactions: Ag1 1 e2 88n Ag(s) %8 5 0.80 V Cu21 1 2e2 88n Cu(s) %8 5 0.34 V In this cell the silver compartment contains a silver elec- trode and excess AgCl(s) (Ksp 5 1.6 3 10210), and the copper compartment contains a copper electrode and [Cu21] 5 2.0 M. a. Calculate the potential for this cell at 258C. b. Assuming 1.0 L of 2.0 M Cu21 in the copper com- partment, calculate the moles of NH3 that would have to be added to give a cell potential of 0.52 V at 258C (assume no volume change on addition of NH3). Cu21(aq) 1 4NH3(aq) 34 Cu(NH3)421(aq) K 5 1.0 3 1013 Pb 1.8 M Pb2

What are the primary responsibilities of a chemical engineer involved in "r& d"? develop large scale manufacturing operations discover new products and processes training of new chemists determine products needed by consumers

One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(ii) carbonate, in concentrated sulfuric acid. the sulfuric acid reacts with the copper(ii) carbonate to produce a blue solution of copper(ii) sulfate. scrap iron is then added to this solution, and pure copper metal precipitates out because of the following chemical reaction: (s) (aq) (s) (aq) suppose an industrial quality-control chemist analyzes a sample from a copper processing plant in the following way. he adds powdered iron to a copper(ii) sulfate sample from the plant until no more copper will precipitate. he then washes, dries, and weighs the precipitate, and finds that it has a mass of .

#7 how does the structure of amino acids allow them to form a polypeptide? each amino acid has an amino group and a carboxyl group. each amino acid has a hydrogen atom and a carboxyl group. each amino acid has a carboxyl group and an r group. each amino acid has an r group and a hydrogen atom.