Question

which products would result from the double replacement reaction between mgcl2(aq) and na2co3 (aq)?
a) d) nacl (aq) and mg(co3)2 (s)
b) c) nacl (aq) and mg2co3 (s)
c) b) nacl (aq) and mgco3 (s)
d) a) na2cl2 (aq) and mgco3 (s)

Explanation:

Step1: Write the double - replacement reaction

The general form of a double - replacement reaction is \(AB + CD
ightarrow AD+CB\). For \(MgCl_2(aq)\) and \(Na_2CO_3(aq)\), \(A = Mg^{2 +}\), \(B=Cl^{-}\), \(C = Na^{+}\), \(D = CO_3^{2-}\). The reaction is \(MgCl_2(aq)+Na_2CO_3(aq)
ightarrow MgCO_3(s)+2NaCl(aq)\).

Step2: Analyze the products

Magnesium carbonate (\(MgCO_3\)) is insoluble in water and forms a solid (s), while sodium chloride (\(NaCl\)) is soluble in water and remains in the aqueous (aq) state.

Answer:

C. \(NaCl(aq)\) and \(MgCO_3(s)\)