Question

A. Suppose that aqueous solutions of barium nitrate and potassium carbonate are mixed. What is the name of the compound or compounds that precipitate?

B. Insoluble sulfide compounds are generally black in color. Which of the following combinations could yield a black precipitate?

Check all that apply.

	Na2S(aq)+KCl(aq)
	Li2S(aq)+Pb(NO3)2(aq)
	Pb(ClO3)2(aq)+NaNO3(aq)
	AgNO3(aq)+KCl(aq)
	K2S(aq)+Sn(NO3)4(aq)

C. Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate. Express answer as a chemical equation.

Answer 1

Answer: According to the given informations

A]  Barium Nitrate plus Potassium Carbonate = Barium Carbonate plus Potassium Nitrate. Barium Carbonate is insoluble in water and is the precipitate.

B] As we know that the potassium and sodium salts are soluble so option 1 is eliminated now the Same is true for chlorates and nitrates, so 3) is eliminated. That means you have to look up the solubility and color for PbS, AgCl and SnS2. And in genral the black galena (PbS) is shows .

Hence this is all about the given question .

C] NaCl + AgNO3 >>> NaNO3 + AgCl
Now we only write a net ionic equation of the reactants that form the precipitate in this case Ag Cl
Ag+ > Cl- >>> AgCl [s]

Thank you :)