Question

Complete the following chemical reactions by predicting the products, determining states of matter, and balancing the equation. Use solubility rules to predict if a precipitate is formed.

Mg(NO3)2 + (NH4)3PO4 -->

Ba(NO3)2 + H2SO4 -->

Ca(NO3)2 + Na2CO3 -->

Sr(NO3)2 + K2S -->

Answer 1

a)

Mg(NO3)2 + (NH4)3PO4 --> Mg3(PO4)2 + NH4NO3

3Mg(NO3)2 + 2(NH4)3PO4 --> Mg3(PO4)2 +6NH4NO3

nitartes and ammonium ions are soluble, Phosphates are not,

3Mg(NO3)2 + 2(NH4)3PO4 --> Mg3(PO4)2(s) +6NH4NO3

b)

Ba(NO3)2 + H2SO4 --> BaSO4 + HNO3

Ba(NO3)2 + H2SO4 --> BaSO4 + 2HNO3

note that BaSO4 sulfates are not soluble, nitrates are soluble so

Ba(NO3)2 + H2SO4 --> BaSO4(s) + 2HNO3

c)

Ca(NO3)2 + Na2CO3 -->CaCO3 + NaNO3

Ca(NO3)2 + Na2CO3 -->CaCO3 + 2NaNO3

nitrates are soluble, Carboantes are not

Ca(NO3)2 + Na2CO3 -->CaCO3(s) + 2NaNO3

d)

Sr(NO3)2 + K2S -->SrS + KNO3

Sr(NO3)2 + K2S -->SrS + 2KNO3

nitrates are soluble; Sulfides are not

Sr(NO3)2 + K2S -->SrS(s) + 2KNO3