Which of the following are single replacement reactions? Choose all that apply.

Question 1 options:


NaHCO3(s) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(l)


Zn(s) + 2 HC2H3O2(aq) → Zn(C2H3O2)2(aq) + H2(g)


N2(g) + 3 H2(g) → 2 NH3(g)


2 AgNO3(aq) + Cu(s) → 2 Ag(s) + Cu(NO3)2(aq)

To determine which of the given reactions are single replacement reactions, we need to understand what single replacement reactions are.

Single replacement reactions, also known as displacement reactions, occur when one element replaces another element in a compound. In these reactions, one element is being "displaced" or replaced by another element.

Now, let's analyze each of the given reactions:

1. NaHCO3(s) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(l)
This is not a single replacement reaction. It is a double displacement reaction, where sodium chloride and carbon dioxide are formed as the products.

2. Zn(s) + 2 HC2H3O2(aq) → Zn(C2H3O2)2(aq) + H2(g)
This is a single replacement reaction. Zinc (Zn) is replacing hydrogen (H) in acetic acid (HC2H3O2) to form zinc acetate (Zn(C2H3O2)2) and hydrogen gas (H2).

3. N2(g) + 3 H2(g) → 2 NH3(g)
This is not a single replacement reaction. It is a synthesis reaction, where nitrogen gas (N2) and hydrogen gas (H2) combine to form ammonia gas (NH3).

4. 2 AgNO3(aq) + Cu(s) → 2 Ag(s) + Cu(NO3)2(aq)
This is a single replacement reaction. Copper (Cu) is displacing silver (Ag) in silver nitrate (AgNO3) to form silver (Ag) and copper nitrate (Cu(NO3)2).

Therefore, the single replacement reactions among the given options are:
- Zn(s) + 2 HC2H3O2(aq) → Zn(C2H3O2)2(aq) + H2(g)
- 2 AgNO3(aq) + Cu(s) → 2 Ag(s) + Cu(NO3)2(aq)

3 is a synthesis.