Question

срочно нужна помощь...1. С раствором серной кислоты реагируют вещества:1) оксид магния ; 2) гидроксид алюминия ; 3) серебро ;4) сероводород ; 5) хлорид калия.2. С соляной кислотой реагируют вещества: 1) гидроксид меди (II) ;2) оксид углерода (IV); 3) нитрат серебра ; 4) ртуть ; 5) сульфат натрия.

Answer 1

1. cеребро(2Ag + H2SO4=2Ag + H2SO4)

гидроксид алюминия (

Al2(SO4)3(оч. разб.) + 6H2O = 2Al(OH)3↓ + 3H2SO4)

cероводород( 3H2S + H2SO4 = 4S + 4H2O) 

и хлорид калия ( KCl(тверд.) + H2SO4(конц.) = KHSO4 + HCl↑)

2. гидроксид меди (2) (   Cu(OH)2 + 2HCl(разб.) = CuCl2 + 2H2O), 

оксид углерода(4) ( CCl2O + H2O = CO2↑ + 2HCl), 

ртуть ( 2Hg + 4HCl(разб.) + O2 = 2HgCl2 + 2H2O),

сульфат натрия ( NaCl + NaHSO4 = Na2SO4 + HCl)

ОТВЕТ: 1. 2) 3) 4) 5). .2 1) 2) 4) 5).  

Answer 2

Reactions with Sulfuric Acid:

When reacting with sulfuric acid, the following substances can be involved:

1. Magnesium Oxide (MgO): Magnesium oxide reacts with sulfuric acid to form magnesium sulfate and water. The balanced chemical equation for this reaction is:

   MgO + H2SO4 -> MgSO4 + H2O
   

2. Aluminum Hydroxide (Al(OH)3): Aluminum hydroxide reacts with sulfuric acid to form aluminum sulfate and water. The balanced chemical equation for this reaction is:

   Al(OH)3 + 3H2SO4 -> Al2(SO4)3 + 6H2O
   

3. Silver (Ag): Silver does not react with sulfuric acid under normal conditions. However, if heated, it can react with concentrated sulfuric acid to form silver sulfate and sulfur dioxide gas. The balanced chemical equation for this reaction is:

   2Ag + 2H2SO4 -> Ag2SO4 + 2H2O + SO2
   

4. Hydrogen Sulfide (H2S): Hydrogen sulfide is a gas that can react with sulfuric acid to form sulfur dioxide gas and water. The balanced chemical equation for this reaction is:

   H2S + H2SO4 -> SO2 + 2H2O
   

5. Potassium Chloride (KCl): Potassium chloride does not react with sulfuric acid under normal conditions. However, if heated, it can react with concentrated sulfuric acid to form potassium hydrogen sulfate and hydrochloric acid. The balanced chemical equation for this reaction is:

   2KCl + H2SO4 -> K2SO4 + 2HCl