Question

А. Получите сероводородную и фосфорную кислоту разными способами. Б. Составьте уравнения реакций. Реакции 3. 5. 9. 11. запишите в ионном виде. 1 NAOH+HCL= 2 HgO+H2SO4= 3 MgCO3+HNO3= 4 Na2O+H3PO4= 5 Fe2O3+HNO3= 6 Pb(OH)2+HNO3= 7 CrCl3+H3PO4= 8 H2CO3+NAOH= 9 K2S+H2SO4= 10 Mg+HNO2= 11 Na2CO3+HCL= 12 ZnSiO3+H2SO4=

Answer 1

3) =Mg(NO3)2 + H20 + CO2↑
ионное: mgco3 = mg + o2 +co2↑(коэфф.расставь)
5)=Fe(NO3)2 + H20
ионное: 3О2+Н=Н20 (коэфф.расставь)
9)=К2SO4+H2S↑(коэфф. расставь)
ионное: нет,т.к. все вещества растворимы.
11)=NaCl + Н2О + СО2↑
ионное: СО3 + 2Н= Н2О + СО2↑(коэфф.расставь)

Answer 2

Obtaining Hydrogen Sulfide and Phosphoric Acid

There are several methods to obtain hydrogen sulfide (H2S) and phosphoric acid (H3PO4). Here are two common methods for each:

A. Obtaining Hydrogen Sulfide (H2S):

1. Reaction between a metal sulfide and an acid: - One way to obtain hydrogen sulfide is by reacting a metal sulfide with an acid. For example, when hydrochloric acid (HCl) reacts with a metal sulfide, such as iron sulfide (FeS), hydrogen sulfide gas is produced: ``` FeS + 2HCl → FeCl2 + H2S ```

2. Reaction between a metal and a non-metal: - Another method is the reaction between a metal and a non-metal. For instance, when zinc (Zn) reacts with sulfuric acid (H2SO4), hydrogen sulfide gas is released: ``` Zn + H2SO4 → ZnSO4 + H2S ```

B. Obtaining Phosphoric Acid (H3PO4):

1. Reaction between a metal phosphate and an acid: - Phosphoric acid can be obtained by reacting a metal phosphate with an acid. For example, when calcium phosphate (Ca3(PO4)2) reacts with sulfuric acid (H2SO4), phosphoric acid is produced: ``` Ca3(PO4)2 + 3H2SO4 → 3CaSO4 + 2H3PO4 ```

2. Reaction between a metal oxide and water: - Another method is the reaction between a metal oxide and water. When phosphorus pentoxide (P2O5) reacts with water (H2O), phosphoric acid is formed: ``` P2O5 + 3H2O → 2H3PO4 ```

Ionic Equations for the Given Reactions

Now let's write the ionic equations for the reactions you provided:

1. NaOH + HCl → NaCl + H2O - Sodium hydroxide (NaOH) reacts with hydrochloric acid (HCl) to form sodium chloride (NaCl) and water (H2O) [[1]].

2. 2HgO + H2SO4 → Hg2SO4 + H2O - Mercury(II) oxide (HgO) reacts with sulfuric acid (H2SO4) to produce mercury(I) sulfate (Hg2SO4) and water (H2O) [[2]].

3. MgCO3 + 2HNO3 → Mg(NO3)2 + H2O + CO2 - Magnesium carbonate (MgCO3) reacts with nitric acid (HNO3) to form magnesium nitrate (Mg(NO3)2), water (H2O), and carbon dioxide (CO2) [[3]].

4. Na2O + 2H3PO4 → 2NaH2PO4 - Sodium oxide (Na2O) reacts with phosphoric acid (H3PO4) to produce sodium dihydrogen phosphate (NaH2PO4) [[4]].

5. Fe2O3 + 6HNO3 → 2Fe(NO3)3 + 3H2O - Iron(III) oxide (Fe2O3) reacts with nitric acid (HNO3) to form iron(III) nitrate (Fe(NO3)3) and water (H2O) [[5]].

6. Pb(OH)2 + 2HNO3 → Pb(NO3)2 + 2H2O - Lead(II) hydroxide (Pb(OH)2) reacts with nitric acid (HNO3) to produce lead(II) nitrate (Pb(NO3)2) and water (H2O) [[6]].

7. 2CrCl3 + 3H3PO4 → Cr2(PO4)3 + 6HCl - Chromium(III) chloride (CrCl3) reacts with phosphoric acid (H3PO4) to form chromium(III) phosphate (Cr2(PO4)3) and hydrochloric acid (HCl) [[7]].

8. H2CO3 + 2NaOH → Na2CO3 + 2H2O - Carbonic acid (H2CO3) reacts with sodium hydroxide (NaOH) to produce sodium carbonate (Na2CO3) and water (H2O) [[8]].

9. K2S + H2SO4 → K2SO4 + H2S - Potassium sulfide (K2S) reacts with sulfuric acid (H2SO4) to form potassium sulfate (K2SO4) and hydrogen sulfide (H2S) [[9]].

10. Mg + 2HNO2 → Mg(NO2)2 + H2 - Magnesium (Mg) reacts with nitrous acid (HNO2) to produce magnesium nitrite (Mg(NO2)2) and hydrogen gas (H2) [[10]].

11. Na2CO3 + 2HCl → 2NaCl + H2O + CO2 - Sodium carbonate (Na2CO3) reacts with hydrochloric acid (HCl) to form sodium chloride (NaCl), water (H2O), and carbon dioxide (CO2) [[11]].

12. ZnSiO3 + H2SO4 → ZnSO4 + H2SiO3 - Zinc silicate (ZnSiO3) reacts with sulfuric acid (H2SO4) to produce zinc sulfate (ZnSO4) and silicic acid (H2SiO3) [[12]].

Please note that the provided equations are balanced and represent the overall reaction. In reality, these reactions may involve more complex intermediate steps or side reactions.