Chapter 2, Problem 27P

Cryolite $\left({\text{Na}}_{\text{3}}{\text{AlF}}_{\text{6}}\right)$ is used in the production of aluminumfrom its ores. It is made by the reaction

$\text{6NaOH}+{\text{Al}}_{\text{2}}{\text{O}}_{\text{3}}+\text{12HF}\to {\text{2Na}}_{\text{3}}{\text{AlF}}_{\text{6}}+{\text{9H}}_{\text{2}}\text{O}$

Calculate the mass of cryolite that can be prepared by thecomplete reaction of ${\text{287 g Al}}_{\text{2}}{\text{O}}_{\text{3}}$ .