Which of the following groups of substances is required for the recognition of nitric, sulfuric and hydrochloric acids?
| April 10, 2021 | education
Which of the following groups of substances is required for the recognition of nitric, sulfuric and hydrochloric acids? a) Pb (NO3) 2, BaCl2, Cu b) BaCl2, H2SO4, K2S c) AgNo3, BaCl2, Cu d) AgNO3, H2SO4, NaNO
The correct answer is under the letter c.
AgNO₃ + HCl = HNO₃ + AgCl ↓ (white curdled precipitate);
BaCl₂ + H₂SO₄ = 2HCl + BaSO₄ ↓ (white precipitate);
Cu + 4HNO₃ = Cu (NO₃) ₂ + 2H₂O + 2NO₂ ↑ (red-brown gas).
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