When the solutions of what substances interact, gas is formed a) potassium hydroxide and hydrochloric acid

| November 18, 2020 | education

When the solutions of what substances interact, gas is formed a) potassium hydroxide and hydrochloric acid b) barium chloride and potassium sulfate c) potassium carbonate and nitric acid. Write the reaction equation in molecular and ionic forms.

Let us write the reaction equations in molecular form:
a) KOH + HCl = KCl + H2O, salt is formed (neutralization reaction)
b) BaCl2 + K2SO4 = BaSO4 + 2KCl, BaSO4 precipitate is formed
c) K2CO3 + 2HNO3 = 2KNO3 + H2O + CO2, CO2 gas is formed, correct answer
Reaction equations in full ionic form (by electrolytic q-i):
2K (+) + CO3 (2-) + 2H (+) + 2NO3 (-) = 2K (+) + 2NO3 (-) + H2O + CO2
Reducing the same ions in products and reagents, we obtain an abbreviated ionic equation:
2H (+) + CO3 (2-) = H2O + CO2



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