Question

Расставьте коэффициенты в приведенных схемах. Укажите тип химической реакции. а) Fe + Cl2 → FeCl3 б) KClO3 → KCl + O2 в) N2O5 + H2O → HNO3 г) Cr2 (SO4)3 + KOH → Cr(OH)3 + K2SO4 д) Fe2O3 + Mg → MgO + Fe е) H2O + P2O5 → H3PO4 ж) CaO + H3PO4 → Ca3(PO4) + H2O

Answer 1

Ответ:

Объяснение:

2Fe + 3Cl2 = 2FeCl3    соединение

2KClO3 -> 2KCl + 3O2    разложение

N2O5 + H2O = 2HNO3    соединение

Cr2(SO4)3 + 6KOH = 2Cr(OH)3 + 3K2SO4      обмен

Fe2O3 + 3Mg = 3MgO + 2Fe     замещение

3H2O + P2O5 = 2H3PO4      соединение

3CaO + 2H3PO4 = Ca3(PO4)2 + 3H2O     обмен

Answer 2

a) Fe + Cl2 → FeCl3

The coefficients for the balanced chemical equation are: 2 Fe + 3 Cl2 → 2 FeCl3

This is a combination reaction where iron (Fe) reacts with chlorine gas (Cl2) to form iron(III) chloride (FeCl3) [[1]].

b) KClO3 → KCl + O2

The coefficients for the balanced chemical equation are: 2 KClO3 → 2 KCl + 3 O2

This is a decomposition reaction where potassium chlorate (KClO3) decomposes into potassium chloride (KCl) and oxygen gas (O2) [[2]].

c) N2O5 + H2O → HNO3

The coefficients for the balanced chemical equation are: N2O5 + H2O → 2 HNO3

This is a hydrolysis reaction where dinitrogen pentoxide (N2O5) reacts with water (H2O) to form nitric acid (HNO3) [[3]].

d) Cr2(SO4)3 + KOH → Cr(OH)3 + K2SO4

The coefficients for the balanced chemical equation are: Cr2(SO4)3 + 6 KOH → 2 Cr(OH)3 + 3 K2SO4

This is a double displacement reaction where chromium(III) sulfate (Cr2(SO4)3) reacts with potassium hydroxide (KOH) to form chromium(III) hydroxide (Cr(OH)3) and potassium sulfate (K2SO4) [[4]].

e) Fe2O3 + Mg → MgO + Fe

The coefficients for the balanced chemical equation are: 2 Fe2O3 + 3 Mg → 3 MgO + 4 Fe

This is a redox reaction where iron(III) oxide (Fe2O3) reacts with magnesium (Mg) to form magnesium oxide (MgO) and iron (Fe) [[5]].

f) H2O + P2O5 → H3PO4

The coefficients for the balanced chemical equation are: P2O5 + 3 H2O → 2 H3PO4

This is a hydration reaction where phosphorus pentoxide (P2O5) reacts with water (H2O) to form phosphoric acid (H3PO4) [[6]].

g) CaO + H3PO4 → Ca3(PO4)2 + H2O

The coefficients for the balanced chemical equation are: 3 CaO + 2 H3PO4 → Ca3(PO4)2 + 3 H2O

This is a double displacement reaction where calcium oxide (CaO) reacts with phosphoric acid (H3PO4) to form calcium phosphate (Ca3(PO4)2) and water (H2O) [[7]].

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