Question

When the equation BiCl3 + H2S → Bi2S3 + HCl is the coefficient of HCl will be

Answer 1

The product Bismuth (III) sulfide ($Bi_{2}S_{3}$) is used as a starting material for the synthesis of other bismuth compounds. It is formed, together with an acid, from a reaction between a Bismuth (III) salt and hydrogen sulfide ($H_{2}S$). In the given reaction, the Bismuth salt used in the reaction is Bismuth (III) chloride ($BiCl_{3}$). 

The balanced reaction of $BiCl_{3}$ and $H_{2}S$ is

$2BiCl_{3} + 3H_{2}S --> Bi_{2}S_{3}+ 6HCl$

Thus, the coefficient of HCl in the reaction is 6.