Question

question 6 (1 point)
what would be the products of the following mixture of aqueous solutions
na2so4 + cacl2 --->
a) cas + naocl
b) cana + so4cl
c) socl2 + naoca
d) nacl2 + caso4
e) caso4 + nacl

Explanation:

Step1: Write the balanced chemical equation

$$\mathrm{Na_2SO_4(aq) + CaCl_2(aq) ightarrow CaSO_4(s)+ 2NaCl(aq)}$$

This is a double - displacement reaction. In double - displacement reactions, the general form is \(AB + CD
ightarrow AD+CB\). Here, \(A = Na\), \(B=SO_4\), \(C = Ca\), and \(D = Cl\).

Step2: Analyze the products

• Calcium sulfate (\(\mathrm{CaSO_4}\)) is an insoluble salt (precipitate) according to solubility rules (most sulfates are soluble, but calcium sulfate has low solubility).
• Sodium chloride (\(\mathrm{NaCl}\)) is a soluble salt (all sodium salts and most chloride salts are soluble).

Answer:

E. \(\mathrm{CaSO_4 + NaCl}\)