Question

1)H2Cl2+K2SO4–> 2)KNO3+NaCl—> 3)MgCO3–>

Answer 1

H₂Cl₂ + K₂SO₄ = H₂SO₄ + 2KCl

KNO₃ + NaCl = KCl +NaNO₃

MgCO₃ = MgO + CO₂

Answer 2

I will answer your questions in detail.

1) H2Cl2 + K2SO4 → 2HCl + K2SO4

This is a decomposition reaction, where a compound breaks down into simpler substances. H2Cl2 is an unstable molecule that decomposes into two molecules of hydrochloric acid (HCl). Potassium sulfate (K2SO4) does not react and remains unchanged in the solution. You can find more information about decomposition reactions on [this website](https://quizlet.com/321273611/chapter-7-chem-flash-cards/).

2) KNO3 + NaCl → No reaction

This is a double displacement reaction, where the cations and anions of two compounds exchange places. However, in this case, no reaction occurs because both products are soluble in water and no precipitate is formed. The solubility rules can help you predict which compounds are soluble or insoluble in water. You can review the solubility rules on [this website](https://quizlet.com/455229412/chemistry-110-unit-4-flash-cards/).

3) MgCO3 → MgO + CO2

This is another decomposition reaction, where magnesium carbonate (MgCO3) breaks down into magnesium oxide (MgO) and carbon dioxide (CO2) when heated. This reaction is commonly used to produce lime (MgO), which has many industrial applications. You can learn more about the uses of lime on [this website].