4.1 Exercise 3

Balance the following equations:

(a) $\text{PCl}_{5} \left(s\right) + \text{H}_{2} \text{O} \left(l\right) \rightarrow \text{POCl}_{3} \left(l\right) + \text{HCl} \left(a q\right)$

(b) $\text{Cu} \left(s\right) + \text{HNO}_{3} \left(a q\right) \rightarrow \text{Cu} \left(\text{NO}_{3}\right)_{2} \left(a q\right) + \text{H}_{2} \text{O} \left(l\right) + \text{NO} \left(g\right)$

(c) $\text{H}_{2} \left(g\right) + \text{I}_{2} \left(s\right) \rightarrow \text{HI} \left(s\right)$

(d) $\text{Fe} \left(s\right) + \text{O}_{2} \left(g\right) \rightarrow \text{Fe}_{2} \text{O}_{3} \left(s\right)$

(e) $\text{Na} \left(s\right) + \text{H}_{2} \text{O} \left(l\right) \rightarrow \text{NaOH} \left(a q\right) + \text{H}_{2} \left(g\right)$

(f) $\left(\right. \text{NH}_{4} \left.\right)_{2} \text{Cr}_{2} \text{O}_{7} \left(s\right) \rightarrow \text{Cr}_{2} \text{O}_{3} \left(s\right) + \text{N}_{2} \left(g\right) + \text{H}_{2} \text{O} \left(g\right)$

(g) $\text{P}_{4} \left(s\right) + \text{Cl}_{2} \left(g\right) \rightarrow \text{PCl}_{3} \left(l\right)$

(h) $\text{PtCl}_{4} \left(s\right) \rightarrow \text{Pt} \left(s\right) + \text{Cl}_{2} \left(g\right)$