Question

С наибольшей скоростью при обычных условиях протекает реакция между 1) раствором соляной кислоты и мрамором 2) раствором серной кислоты и магнием 3) известковой водой и углекислым газом 4) раствором сульфата натрия и раствором нитрата бария

Answer 1

3, потому что газ.Ca (OH)2 + CO2 = CaCO3 + H2O

Answer 2

The reaction with the highest speed under normal conditions is between:

1) A solution of hydrochloric acid and marble. 2) A solution of sulfuric acid and magnesium. 3) Lime water and carbon dioxide gas. 4) A solution of sodium sulfate and a solution of barium nitrate.

The reaction with the highest speed under normal conditions is the reaction between a solution of hydrochloric acid and marble. This reaction produces carbon dioxide gas, water, and a salt called calcium chloride. The reaction can be represented by the following equation:

HCl(aq) + CaCO3(s) → CO2(g) + H2O(l) + CaCl2(aq)

The reaction between a solution of sulfuric acid and magnesium is also relatively fast. This reaction produces hydrogen gas and a salt called magnesium sulfate. The reaction can be represented by the following equation:

H2SO4(aq) + Mg(s) → H2(g) + MgSO4(aq)

The reaction between lime water (a solution of calcium hydroxide) and carbon dioxide gas is a relatively slow reaction. This reaction produces calcium carbonate, which is insoluble and forms a white precipitate. The reaction can be represented by the following equation:

Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O(l)

The reaction between a solution of sodium sulfate and a solution of barium nitrate is also relatively slow. This reaction produces a white precipitate of barium sulfate and a solution of sodium nitrate. The reaction can be represented by the following equation:

Na2SO4(aq) + Ba(NO3)2(aq) → BaSO4(s) + 2NaNO3(aq)

Please note that the speed of a reaction can be influenced by various factors such as temperature, concentration, and the presence of catalysts. The information provided here is based on the assumption of normal conditions.