Question

1 multiple choice 1 point
the products of the exchange reaction that occur when baso₄ and kcl are mixed together are bacl₂ and...
so₄k.
kso₄.
k₂so₄.
kcl.

2 true or false 1 point
pbso₄ is soluble in water.
true
false

3 true or false 1 point
all compounds containing nitrate are soluble.
true
false

Explanation:

Question 1

Step1: Recall exchange reaction rules

Exchange reactions (double - displacement) follow the pattern \(AB + CD
ightarrow AD+CB\). For \(BaSO_4\) and \(KCl\), the ions are \(Ba^{2 + }\), \(SO_4^{2 - }\), \(K^+\), and \(Cl^-\).

Step2: Determine products

If we swap the cations and anions, we would get \(BaCl_2\) and \(K_2SO_4\) (since \(K^+\) has a charge of \( + 1\) and \(SO_4^{2 - }\) has a charge of \(- 2\), so we need 2 \(K^+\) to balance the charge of \(SO_4^{2 - }\), giving \(K_2SO_4\)). Also, we should note that \(BaSO_4\) is insoluble in water, so the reaction may not occur in the traditional sense of a solution - based exchange reaction, but for the sake of the product formula based on ion exchange, the formula of the other product is \(K_2SO_4\).

According to the solubility rules, lead(II) sulfate (\(PbSO_4\)) is insoluble in water.

The solubility rule states that all nitrate - containing compounds (\(NO_3^-\)) are soluble in water, regardless of the cation they are paired with.

Answer:

C. \(K_2SO_4\)

Question 2