Question

1. Расставьте коэффициенты в уравнениях химических реакций, укажите типы химических реакции.а) Al + O2 —> Al2O3б) MnO2 + H2 —> Mn + H2Oв) H2O2 —> H2 + O2г) HNO3 + Fe(OH)3 —> Fe(NO3)3 + H2O

Answer 1

1-окисление
2-гидрирование
3-разложение
4-замещение

Answer 2

Chemical Equations and Reaction Types

a) The balanced chemical equation for the reaction between aluminum (Al) and oxygen (O2) to form aluminum oxide (Al2O3) is:

2Al + 3O2 → 2Al2O3 [[1]]

This is a combination reaction, also known as a synthesis reaction, where two or more substances combine to form a single product.

b) The balanced chemical equation for the reaction between manganese dioxide (MnO2) and hydrogen gas (H2) to form manganese ions (Mn++) and water (H2O) is:

MnO2 + 4H2 → Mn++ + 4H2O [[2]]

This is a redox reaction, specifically a reduction reaction, where manganese dioxide is reduced to manganese ions.

c) The balanced chemical equation for the decomposition of hydrogen peroxide (H2O2) into hydrogen gas (H2) and oxygen gas (O2) is:

2H2O2 → 2H2 + O2 [[3]]

This is a decomposition reaction, where a single compound breaks down into two or more simpler substances.

d) The balanced chemical equation for the reaction between nitric acid (HNO3) and iron(III) hydroxide (Fe(OH)3) to form iron(III) nitrate (Fe(NO3)3) and water (H2O) is:

6HNO3 + 2Fe(OH)3 → 2Fe(NO3)3 + 6H2O [[4]]

This is a double displacement reaction, also known as a metathesis reaction, where the positive and negative ions of two compounds exchange places to form new compounds.

Please let me know if you have any further questions!