Question

select the two products of the double replacement reaction below?

$(nh_{4})_{2}so_{4}(aq)+ca(no_{3})_{2}(aq)\to??? +???$

$\square\\ caso_{4}(s)$

$\square\\ so_{4}ca(s)$

$\square\\ nh_{4}no_{3}(aq)$

$\square\\ (nh_{4})_{2}(no_{3})_{2}(aq)$

Explanation:

Step1: Understand double - replacement reaction

In a double - replacement reaction \(AB + CD
ightarrow AD+CB\).
For \((NH_4)_2SO_4(aq)+Ca(NO_3)_2(aq)\), \(A = NH_4^+\), \(B=SO_4^{2 -}\), \(C = Ca^{2+}\), \(D = NO_3^-\).

Step2: Write the products

The products are \(NH_4NO_3\) and \(CaSO_4\).
According to solubility rules:

• Most nitrates \((NO_3^-)\) are soluble. So \(NH_4NO_3\) is in aqueous (\(aq\)) state.
• Sulfates \((SO_4^{2 -})\) are generally soluble, but \(CaSO_4\) is slightly soluble and is written as a solid (\(s\)) in the reaction.

So the two products are \(CaSO_4(s)\) and \(NH_4NO_3(aq)\).

Answer:

A. \(CaSO_4(s)\), C. \(NH_4NO_3(aq)\)