Question

A) Ca → CaO → Ca(OH)2 → CaCl2→ CaCO3 b) Zn → ZnCl2 → Zn(OH)2 → ZnSO4 c) Fe → FeSO4→ Fe(OH)2 → FeCl2 → Fe d) CuSO4 → Cu(OH)2 → CuO → Cu e) C3H8 → CO2 → CaCO3 → CaCl2

Answer 1

Ответ:

a) O2 +2 Ca → 2CaO

H2O + CaO → Ca(OH)2

2HCl + Ca(OH)2 → 2H2O + CaCl2

CaCl2 + Na2CO3 → 2NaCl + CaCO3

b) 2HCl + Zn → H2 + ZnCl2

2NaOH + ZnCl2 → 2NaCl + Zn(OH)2

H2SO4 + Zn(OH)2 → 2H2O + ZnSO4

c)H2SO4 + Fe → H2 + FeSO4

2 NaOH + FeSO4 → Na2SO4 + Fe(OH)2

2HCl + Fe(OH)2 → 2H2O + FeCl2

Zn + FeCl2 → Fe + ZnCl2

d) 2NaOH + CuSO4 → Na2SO4 + Cu(OH)2

Cu(OH)2 → H2O + CuO

H2 + CuO → H2O + Cu

e) 5 O2  + C3H8  → 4 H2O  + 3 CO2

CO2 + Ca(OH)2  → H2O  + CaCO3

2 HCl  + CaCO3 → H2O  + CO2 + CaCl2

Answer 2

It seems like you've provided a series of chemical reactions for different elements and compounds. These reactions involve various chemical transformations. Let's break down each set of reactions:

A)

1. Ca (Calcium) reacts with oxygen (O2) to form CaO (Calcium Oxide).
2. CaO reacts with water (H2O) to form Ca(OH)2 (Calcium Hydroxide).
3. Ca(OH)2 reacts with HCl (Hydrochloric Acid) to form CaCl2 (Calcium Chloride).
4. CaCl2 reacts with Na2CO3 (Sodium Carbonate) to form CaCO3 (Calcium Carbonate).

B)

1. Zn (Zinc) reacts with HCl (Hydrochloric Acid) to form ZnCl2 (Zinc Chloride).
2. ZnCl2 reacts with NaOH (Sodium Hydroxide) to form Zn(OH)2 (Zinc Hydroxide).
3. Zn(OH)2 reacts with H2SO4 (Sulfuric Acid) to form ZnSO4 (Zinc Sulfate).

C)

1. Fe (Iron) reacts with H2SO4 (Sulfuric Acid) to form FeSO4 (Iron(II) Sulfate).
2. FeSO4 reacts with NaOH (Sodium Hydroxide) to form Fe(OH)2 (Iron(II) Hydroxide).
3. Fe(OH)2 reacts with HCl (Hydrochloric Acid) to form FeCl2 (Iron(II) Chloride).

D)

1. CuSO4 (Copper(II) Sulfate) decomposes to form Cu(OH)2 (Copper(II) Hydroxide) and sulfur trioxide (SO3).
2. Cu(OH)2 decomposes upon heating to form CuO (Copper(II) Oxide).
3. CuO is reduced to elemental Cu (Copper) upon heating.

E)

1. C3H8 (Propane) undergoes combustion with oxygen (O2) to form CO2 (Carbon Dioxide) and H2O (Water).
2. CO2 reacts with Ca(OH)2 (Calcium Hydroxide) to form CaCO3 (Calcium Carbonate).
3. CaCO3 reacts with HCl (Hydrochloric Acid) to form CaCl2 (Calcium Chloride).

These reactions involve various chemical processes, including combustion, acid-base reactions, decomposition, and precipitation. If you have any specific questions about these reactions or their significance, feel free to ask!