Question

the mixing of which pair of reactants will result in a precipitation reaction? group of answer choices kno3(aq) nh4f(aq) csi(aq) naoh(aq) hcl(aq) ca(oh)2(aq) na2so4(aq) ba (no3)2(aq)

Answer 1

When Na2SO4(aq) and Ba(NO3)2(aq) are mixed, precipitation reaction occurs and BaSO4(s) is formed.

Step-by-step explanation:

A precipitation reaction occurs when two aqueous solutions react to form an insoluble solid called a precipitate. To determine if a precipitation reaction will occur, we can refer to the solubility guidelines. In this case, we need to consider the possible pairings of reactants. From the given options, the pair that will result in a precipitation reaction is Na2SO4(aq) and Ba(NO3)2(aq). When these reactants are mixed, a precipitate of BaSO4(s) will form. The balanced net ionic equation for this reaction is Ba^2+(aq) + SO4^2-(aq) -> BaSO4(s).

Answer 2

To determine which pair of reactants will result in a precipitation reaction, you need to identify the possible products of each combination and check if any of them are insoluble compounds.

The general guideline is that when two solutions are mixed and an insoluble product (precipitate) forms, a precipitation reaction occurs. Solubility rules can help in identifying the insoluble compounds.

Based on the solubility rules, the pair that results in a precipitation reaction is:

\[Na2SO4(aq) + Ba(NO3)2(aq)\]

This combination can form BaSO4, which is insoluble. Hence, the precipitation reaction occurs.