Question

match the reaction on the right with the corresponding reaction on the left by writing the correct, matching number in the space provided. solid sodium + chlorine gas → solid sodium chloride 1) aqueous hydrogen peroxide → oxygen gas + liquid water solid sodium + liquid water → aqueous sodium hydroxide + hydrogen gas 2) 2na(s) + cl₂(g) → 2nacl(s) 2h₂(g) + o₂(g) → 2h₂o(g) 3) hydrogen gas + oxygen gas → water gas 2h₂o₂(aq) → o₂(g) + 2h₂o(l) 4) 2na(s) + 2h₂o(l) → 2naoh(aq) + h₂(g)

Explanation:

1. Matching "solid sodium + chlorine gas → solid sodium chloride"

• The left reaction describes the combination of solid sodium (Na) and chlorine gas (Cl₂) to form solid sodium chloride (NaCl). The right reaction 2) is \( 2\text{Na}(s) + \text{Cl}_2(g)

ightarrow 2\text{NaCl}(s) \), which matches the reactants and products. So this left reaction matches with 2.

2. Matching "solid sodium + liquid water → aqueous sodium hydroxide + hydrogen gas"

• The left reaction has solid sodium (Na) and liquid water (H₂O) as reactants, and aqueous sodium hydroxide (NaOH) and hydrogen gas (H₂) as products. The right reaction 4) is \( 2\text{Na}(s) + 2\text{H}_2\text{O}(l)

ightarrow 2\text{NaOH}(aq) + \text{H}_2(g) \), which matches. So this left reaction matches with 4.

3. Matching "\( 2\text{H}_2(g) + \text{O}_2(g)

ightarrow 2\text{H}_2\text{O}(g) \)"

• The left reaction is the combination of hydrogen gas (H₂) and oxygen gas (O₂) to form water gas (H₂O). The right reaction 3) is "hydrogen gas + oxygen gas → water gas", which matches. So this left reaction matches with 3.

4. Matching "\( 2\text{H}_2\text{O}_2(aq)

ightarrow \text{O}_2(g) + 2\text{H}_2\text{O}(l) \)"

• The left reaction is aqueous hydrogen peroxide (H₂O₂) decomposing into oxygen gas (O₂) and liquid water (H₂O). The right reaction 1) is "aqueous hydrogen peroxide → oxygen gas + liquid water", which matches. So this left reaction matches with 1.

Final Matches:

• solid sodium + chlorine gas → solid sodium chloride: 2) \( 2\text{Na}(s) + \text{Cl}_2(g)

ightarrow 2\text{NaCl}(s) \)

• solid sodium + liquid water → aqueous sodium hydroxide + hydrogen gas: 4) \( 2\text{Na}(s) + 2\text{H}_2\text{O}(l)

ightarrow 2\text{NaOH}(aq) + \text{H}_2(g) \)

• \( 2\text{H}_2(g) + \text{O}_2(g)

ightarrow 2\text{H}_2\text{O}(g) \): 3) hydrogen gas + oxygen gas → water gas

• \( 2\text{H}_2\text{O}_2(aq)

ightarrow \text{O}_2(g) + 2\text{H}_2\text{O}(l) \): 1) aqueous hydrogen peroxide → oxygen gas + liquid water

So the numbers to fill in the boxes (from top to bottom) are 2, 4, 3, 1.

Answer:

Top - bottom: 2, 4, 3, 1 (i.e., the first box: 2, second box: 4, third box: 3, fourth box: 1)