Chapter 5, Problem 5.62P

Classify each reaction as combination, decomposition, single replacement, ordouble replacement.
a. $\text{2Al + 6 HC1}\to 2{\text{ AlCl}}_{\text{3}}{\text{+3 H}}_{\text{2}}$
b. ${\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}\to {\text{SO}}_{\text{3}}{\text{+H}}_{\text{2}}\text{O}$
c. ${\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}\text{ + 2 NaOH}\to {\text{Na}}_{\text{2}}{\text{SO}}_4{\text{+2 H}}_{\text{2}}\text{O}$
d. ${\text{2 Ca + O}}_{\text{2}}\to 2\text{ CaO}$