In which of the above pairs do both substances react with dilute sulfuric acid? 1) mercury and mercury oxide 2) sodium carbonate and potassium silicate 3) potassium oxide and hydrogen sulfide 4) zinc hydroxide and sodium chloride
From this list, sodium carbonate (soda) and potassium silicate (liquid glue) will react with dilute sulfuric acid.
To make sure of this, we compose the reaction equation and solve it.
The equation for the interaction of sulfuric acid and sodium carbonate:
Na2CO3 + H2SO4 → Na2SO4 + CO2 ↑ + H2O.
Metabolic products are sodium sulfate, carbonic acid, which, when decomposed, forms carbon dioxide and water.
Sulfuric acid and sodium silicate:
H2SO4 + Na2SiO3 = Na2SO4 + H2SiO3.
As a result of this process, we get metasilicic acid and sodium sulfate.
Answer: sodium carbonate and potassium silicate.
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