Question

redox reaction

acid-base reaction

precipitation reaction

$2\ce{mg}(s) + \ce{o_2}(g) \
ightarrow 2\ce{mgo}(s)$ | $\square$ | $\square$ | $\square$
involves the transfer of electrons between reactants | $\square$ | $\square$ | $\square$
$\ce{mg(oh)_2}(aq) + 2\ce{hcl}(aq) \
ightarrow 2\ce{h_2o}(l) + \ce{mgcl_2}(aq)$ | $\square$ | $\square$ | $\square$
$\ce{zn}(s) + \ce{cu^{2+}}(aq) \
ightarrow \ce{zn^{2+}}(aq) + \ce{cu}(s)$ | $\square$ | $\square$ | $\square$
$4\ce{al}(s) + 3\ce{o_2}(g) \
ightarrow 2\ce{al_2o_3}(s)$ | $\square$ | $\square$ | $\square$
$\ce{bacl_2}(aq) + \ce{naso_4}(aq) \
ightarrow \ce{baso_4}(s) + 2\ce{nacl}(aq)$ | $\square$ | $\square$ | $\square$
$\ce{nacl}(aq) + \ce{agno_3}(aq) \
ightarrow \ce{nano_3}(aq) + \ce{agcl}(s)$ | $\square$ | $\square$ | $\square$
results in the formation of an insoluble solid | $\square$ | $\square$ | $\square$
$\ce{h_2so_4}(aq) + 2\ce{nh_4oh}(aq) \
ightarrow (\ce{nh_4})_2\ce{so_4}(aq) + 2\ce{h_2o}(l)$ | $\square$ | $\square$ | $\square$
$3\ce{naoh}(aq) + \ce{h_3po_4}(aq) \
ightarrow \ce{na_3po_4}(aq) + 3\ce{h_2o}(l)$ | $\square$ | $\square$ | $\square$
involves the transfer of protons ($\ce{h^+}$ ions) | $\square$ | $\square$ | $\square$

Explanation:

Step1: Analyze Redox Reactions

Redox reactions involve electron transfer (change in oxidation states).

• \( 2\text{Mg}(s) + \text{O}_2(g)

ightarrow 2\text{MgO}(s) \): Mg (0→+2), O (0→-2) → Redox (check Redox box).

• "involves electron transfer" → Redox (check Redox box).
• \( \text{Zn}(s) + \text{Cu}^{2+}(aq)

ightarrow \text{Zn}^{2+}(aq) + \text{Cu}(s) \): Zn (0→+2), Cu (+2→0) → Redox (check Redox box).

• \( 4\text{Al}(s) + 3\text{O}_2(g)

ightarrow 2\text{Al}_2\text{O}_3(s) \): Al (0→+3), O (0→-2) → Redox (check Redox box).

Step2: Analyze Acid-Base Reactions

Acid-base reactions involve proton (\( \text{H}^+ \)) transfer (neutralization, form \( \text{H}_2\text{O} \) or salt).

• \( \text{Mg(OH)}_2(aq) + 2\text{HCl}(aq)

ightarrow 2\text{H}_2\text{O}(l) + \text{MgCl}_2(aq) \): Acid (HCl) + Base (Mg(OH)₂) → Salt + Water → Acid-Base (check Acid-Base box).

• \( \text{H}_2\text{SO}_4(aq) + 2\text{NH}_4\text{OH}(aq)

ightarrow (\text{NH}_4)_2\text{SO}_4(aq) + 2\text{H}_2\text{O}(l) \): Acid + Base → Salt + Water → Acid-Base (check Acid-Base box).

• \( 3\text{NaOH}(aq) + \text{H}_3\text{PO}_4(aq)

ightarrow \text{Na}_3\text{PO}_4(aq) + 3\text{H}_2\text{O}(l) \): Acid + Base → Salt + Water → Acid-Base (check Acid-Base box).

• "involves transfer of protons (\( \text{H}^+ \) ions)" → Acid-Base (check Acid-Base box).

Step3: Analyze Precipitation Reactions

Precipitation reactions form an insoluble solid (precipitate).

• \( \text{BaCl}_2(aq) + \text{Na}_2\text{SO}_4(aq)

ightarrow \text{BaSO}_4(s) + 2\text{NaCl}(aq) \) (corrected \( \text{NaSO}_4 \) to \( \text{Na}_2\text{SO}_4 \)): \( \text{BaSO}_4(s) \) is precipitate → Precipitation (check Precipitation box).

• \( \text{NaCl}(aq) + \text{AgNO}_3(aq)

ightarrow \text{NaNO}_3(aq) + \text{AgCl}(s) \): \( \text{AgCl}(s) \) is precipitate → Precipitation (check Precipitation box).

• "results in the formation of an insoluble solid" → Precipitation (check Precipitation box).

Filling the Table (Summary of Checks):

Reaction/Description	Redox Reaction	Acid-Base Reaction	Precipitation Reaction

| \( 2\text{Mg}(s) + \text{O}_2(g)
ightarrow 2\text{MgO}(s) \) | ✔️ | ❌ | ❌ |

involves electron transfer

✔️

❌

❌

| \( \text{Mg(OH)}_2(aq) + 2\text{HCl}(aq)
ightarrow 2\text{H}_2\text{O}(l) + \text{MgCl}_2(aq) \) | ❌ | ✔️ | ❌ |
| \( \text{Zn}(s) + \text{Cu}^{2+}(aq)
ightarrow \text{Zn}^{2+}(aq) + \text{Cu}(s) \) | ✔️ | ❌ | ❌ |
| \( 4\text{Al}(s) + 3\text{O}_2(g)
ightarrow 2\text{Al}_2\text{O}_3(s) \) | ✔️ | ❌ | ❌ |
| \( \text{BaCl}_2(aq) + \text{Na}_2\text{SO}_4(aq)
ightarrow \text{BaSO}_4(s) + 2\text{NaCl}(aq) \) | ❌ | ❌ | ✔️ |
| \( \text{NaCl}(aq) + \text{AgNO}_3(aq)
ightarrow \text{NaNO}_3(aq) + \text{AgCl}(s) \) | ❌ | ❌ | ✔️ |

results in insoluble solid

❌

❌

✔️

| \( \text{H}_2\text{SO}_4(aq) + 2\text{NH}_4\text{OH}(aq)
ightarrow (\text{NH}_4)_2\text{SO}_4(aq) + 2\text{H}_2\text{O}(l) \) | ❌ | ✔️ | ❌ |
| \( 3\text{NaOH}(aq) + \text{H}_3\text{PO}_4(aq)
ightarrow \text{Na}_3\text{PO}_4(aq) + 3\text{H}_2\text{O}(l) \) | ❌ | ✔️ | ❌ |

involves proton transfer

❌

✔️

❌

Answer:

The table is filled as per the above analysis (checkmarks in respective columns for each reaction/description).