Chapter 5, Problem 70IAE

Following are some laboratory methods occasionally used for the preparation of small quantities of chemicals. Write a balanced equation for each.
a. preparation of ${\text{H}}_{\text{2}}\text{S}\left(\text{g}\right)\text{ HCI}\left(\text{aq}\right)$ is heated withFeS(s)
b. preparation of ${\text{CI}}_{\text{2}}\left(\text{g}\right)\text{: HCl}\left(\text{aq}\right)$ is heated with ${\text{MnO}}_{\text{2}}\left(\text{s}\right){\text{; MnCI}}_{\text{2}}\left(\text{aq}\right)$ and ${\text{H}}_{\text{2}}\text{O}\left(\text{I}\right)$ are other products
c. preparation of ${\text{N}}_{\text{2}}\left(\text{g}\right){\text{: Br}}_{\text{2}}$ and $N{H}_2$ react in aqueous solution; ${\mathrm{NH}}_{4}Br$ is another product
d. preparation of chlorous acid: an aqueous suspension of solid barium chlorite is treated with dilute ${\mathrm{H}}_{2}S{O}_2\left(aq\right)$