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55ja
@55ja
August 2021
1
9
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Смешивают попарно растворы: 1) NaOH и HNO₃;
2) K₂CO₃ и HCl; 3) CuSO₄ и KOH. В каких случаях протекают реакции?
Составить их молекулярные и ионно-молекулярные уравнения.
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MailaMiller
Verified answer
NaOH + HNO₃ = NaNO₃ + H₂O;
Na⁺
+ OH⁻ + H⁺ +
NO₃⁻
=
Na⁺
+
NO₃⁻
+ H₂O;
OH⁻ + H⁺ = H₂O.
K₂CO₃ + 2HCl = 2KCl + CO₂↑ + H₂O;
2K⁺
+ CO₃²⁻ + 2H⁺ +
2Cl⁻
=
2K⁺
+
2Cl⁻
+ CO₂↑ + H₂O;
CO₃²⁻ + 2H⁺ = CO₂↑ + H₂O.
CuSO₄ + 2KOH = K₂SO₄ + Cu(OH)₂↓;
Cu²⁺ +
SO₄²⁻
+
2K⁺
+ 2OH⁻ =
2K⁺
+
SO₄²⁻
+ Cu(OH)₂↓;
Cu²⁺ + 2OH⁻ = Cu(OH)₂↓.
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Answers & Comments
Verified answer
NaOH + HNO₃ = NaNO₃ + H₂O;Na⁺ + OH⁻ + H⁺ + NO₃⁻ = Na⁺ + NO₃⁻ + H₂O;
OH⁻ + H⁺ = H₂O.
K₂CO₃ + 2HCl = 2KCl + CO₂↑ + H₂O;
2K⁺ + CO₃²⁻ + 2H⁺ + 2Cl⁻ = 2K⁺ + 2Cl⁻ + CO₂↑ + H₂O;
CO₃²⁻ + 2H⁺ = CO₂↑ + H₂O.
CuSO₄ + 2KOH = K₂SO₄ + Cu(OH)₂↓;
Cu²⁺ + SO₄²⁻ + 2K⁺ + 2OH⁻ = 2K⁺ + SO₄²⁻ + Cu(OH)₂↓;
Cu²⁺ + 2OH⁻ = Cu(OH)₂↓.