Question

химия 8 класс.
Помогите пожалуйста!​

Answer 1

$1) 2FeS_{2} + 14H_{2}SO_{4}_{(conc)} \xrightarrow{\text{\hspace{2mm}t\hspace{2mm}}} Fe_{2}(SO_{4})_{3} + 15SO_{2} \uparrow + 14H_{2}O \\2) 2SO_{2} + O_{2} \xrightarrow{\text{\hspace{2mm}t\hspace{2mm}}} 2SO_{3} \uparrow \\3) SO_{3} + H_{2}O \xrightarrow{\text{\hspace{2mm}\hspace{2mm}}} H_{2}SO_{4}$

$4) 4FeS_{2} + 11O_{2} \xrightarrow{\text{\hspace{2mm}t\hspace{2mm}}} 2Fe_{2}O_{3} + 8SO_{2} \uparrow \\5) Fe_{2}O_{3} + 3H_{2} \xrightarrow{\text{\hspace{2mm}t\hspace{2mm}}} 2Fe \downarrow + 3H_{2}O \\6) Fe + 2HCl \xrightarrow{\text{\hspace{2mm}\hspace{2mm}}} FeCl_{2} + H_{2} \uparrow \\7) FeCl_{2} + Na_{2}S \xrightarrow{\text{\hspace{2mm}\hspace{2mm}}} FeS \downarrow + 2NaCl$

$8) Fe_{2}O_{3} + 6HCl \xrightarrow{\text{\hspace{2mm}\hspace{2mm}}} 2FeCl_{3} + 3H_{2}O \\9) FeCl_{3} + 3NaOH \xrightarrow{\text{\hspace{2mm}\hspace{2mm}}} Fe(OH)_{3} \downarrow + 3NaCl \\10) 2Fe(OH)_{3} \xrightarrow{\text{\hspace{2mm}t\hspace{2mm}}} Fe_{2}O_{3} + 3H_{2}O$

Написаны немного не по порядку (уж такая цепочка);

$conc$ - значит концентрированный