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procs96
@procs96
July 2022
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Напишите в молекулярно-ионной форме уравнения реакций:
1) HCN+KOH
2) HCN+NH4OH
3) MgSO4+Be(OH)2
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MailaMiller
Verified answer
1) HCN + KOH = KCN + H₂O;
H⁺ +
CN⁻
+
K⁺
+ OH⁻ =
K⁺
+
CN⁻
+ H₂O;
H⁺ + OH⁻ = H₂O.
2) HCN + NH₄OH = NH₄CN + H₂O;
H⁺ +
CN⁻
+
NH₄⁺
+ OH⁻ =
NH₄⁺
+
CN⁻
+ H₂O;
H⁺ + OH⁻ = H₂O.
3) MgSO₄ + Be(OH)₂ = Mg(OH)₂↓ + BeSO₄;
Mg⁺² +
SO₄²⁻
+
Be⁺²
+ 2OH⁻ = Mg(OH)₂↓ +
Be⁺²
+
SO₄²⁻
;
Mg⁺² + 2OH⁻ = Mg(OH)₂↓.
3 votes
Thanks 4
HUH39I
3-ья реакция не идет, Be(OH)2 не растворим в воде.
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Answers & Comments
Verified answer
1) HCN + KOH = KCN + H₂O;H⁺ + CN⁻ + K⁺ + OH⁻ = K⁺ + CN⁻ + H₂O;
H⁺ + OH⁻ = H₂O.
2) HCN + NH₄OH = NH₄CN + H₂O;
H⁺ + CN⁻ + NH₄⁺ + OH⁻ = NH₄⁺ + CN⁻ + H₂O;
H⁺ + OH⁻ = H₂O.
3) MgSO₄ + Be(OH)₂ = Mg(OH)₂↓ + BeSO₄;
Mg⁺² + SO₄²⁻ + Be⁺² + 2OH⁻ = Mg(OH)₂↓ + Be⁺² + SO₄²⁻;
Mg⁺² + 2OH⁻ = Mg(OH)₂↓.