In 1790, Nicolas Leblanc found a way to form Na2CO3 from NaCl. His process, now
Chapter 22, Problem 22.85(choose chapter or problem)
In 1790, Nicolas Leblanc found a way to form Na2CO3 from NaCl. His process, now obsolete, consisted of three steps: 2NaCl(s) 1 H2SO4 (aq) - Na2SO4(aq) 1 2HCl(g) Na2SO4(s) 1 2C(s) - Na2S(s) 1 2CO2(g) Na2S(s) 1 CaCO3(s) - Na2CO3(s) 1 CaS(s) (a) Write a balanced overall equation for the process. (b) Calculate the DH8 f of CaS if DH8 rxn is 351.8 kJ/mol. (c) Is the overall process spontaneous at standard-state conditions and 298 K? (d) How many grams of Na2CO3 form from 250. g of NaCl if the process is 73% efficient?
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