Question

select the correct answer. which compound in this chemical equation indicates that the reaction is a precipitation reaction? 2naoh(aq) + mgcl₂(aq) → 2nacl(aq) + mg(oh)₂(s)
a. naoh
b. mgcl₂
c. nacl
d. mg(oh)₂

Explanation:

A precipitation reaction produces a solid precipitate. In the given equation, the state symbols are (aq) for aqueous (dissolved) and (s) for solid. \( \text{Mg(OH)}_2 \) has the state symbol (s), meaning it is a solid precipitate formed from the reaction of the aqueous reactants. The other compounds (NaOH, \( \text{MgCl}_2 \), NaCl) are in aqueous solution (aq), so they don't indicate a precipitate.

Answer:

D. \( \text{Mg(OH)}_2 \)