Question

The equation for the reaction by which a sodium cyanide solution dissolves gold from its ore is 4Au+8NaCN+2H2O+O2→4NaAu(CN)2+4NaOH

What is the minimum mass of NaCN required to dissolve the 27 g of Au in a ton of gold ore? Express your answer to two significant figures and include the appropriate units. m(NaCN) =

Answer 1