Ishwar S. answered 03/12/19
University Professor - General and Organic Chemistry
a) This is a single replacement reaction where Zn will take the place of Cu in one of the products.
Zn (s) + Cu(NO3)2 (aq) → Zn(NO3)2 (aq) + Cu (s)
b) This is a combination reaction where 2 or more elements combine to form one compound.
2 Na (s) + Cl2 (g) → 2 NaCl (s)
c) This is a neutralization reaction where a base, Ba(OH)2, reacts with an acid, HCl, to form salt and water as the products.
Ba(OH)2 (aq) + 2 HCl (aq) → BaCl2 (aq) + 2 H2O (l)