Question

a common chemical reaction involves two ionic compounds that exchange ions to form two new compounds. the reactants and products for one of these reactions are given below.
reactants: potassium sulfate and barium nitrate
products: barium sulfate and potassium nitrate
which of the following shows the correct formulas for the reactants?
choose 1 answer:
a k₂so₄ + ba(no₃)₂
b k₂s + ba(no₃)₂
c kso₄ + bano₃
d k₂s + bano₃
which of the following shows the correct formulas for the products?
choose 1 answer:
a bas + k₂no₃
b baso₄ + kno₃
c so₄ba + no₃k

Explanation:

Step1: Determine potassium sulfate formula

Potassium has a +1 charge ($K^+$) and sulfate has a -2 charge ($SO_4^{2-}$). To balance the charges, we need 2 potassium ions, so the formula is $K_2SO_4$.

Step2: Determine barium nitrate formula

Barium has a +2 charge ($Ba^{2+}$) and nitrate has a -1 charge ($NO_3^{-}$). To balance the charges, we need 2 nitrate ions, so the formula is $Ba(NO_3)_2$. The correct reactant formula is $K_2SO_4 + Ba(NO_3)_2$.

Step3: Determine barium sulfate formula

Barium has a +2 charge ($Ba^{2+}$) and sulfate has a -2 charge ($SO_4^{2-}$), so the formula is $BaSO_4$.

Step4: Determine potassium nitrate formula

Potassium has a +1 charge ($K^+$) and nitrate has a -1 charge ($NO_3^{-}$), so the formula is $KNO_3$. The correct product formula is $BaSO_4+KNO_3$.

Answer:

For reactants: A. $K_2SO_4 + Ba(NO_3)_2$
For products: B. $BaSO_4 + KNO_3$