Question

2.Химическая реакция возможна между: а)Zn+Al(NO3)3 б)Hg+Cu(NO3)2 в)Cu+Fe2(SO4)3 г)Ca+HCl

Answer 1

Правильные ответы под буквами а и г

Answer 2

Chemical Reactions

Chemical reactions are possible between certain combinations of elements and compounds. Let's explore the possibilities for the given combinations:

а) Zn + Al(NO3)3 - A chemical reaction is possible between zinc (Zn) and aluminum nitrate (Al(NO3)3). When zinc is added to aluminum nitrate, a displacement reaction occurs, and zinc nitrate and aluminum are formed. - This reaction can be represented by the following chemical equation: ``` Zn + 2Al(NO3)3 -> 2Al + 3Zn(NO3)2 ``` - This reaction is an example of a single displacement reaction, where one element replaces another in a compound.

б) Hg + Cu(NO3)2 - A chemical reaction is possible between mercury (Hg) and copper(II) nitrate (Cu(NO3)2). When mercury is added to copper(II) nitrate, a displacement reaction occurs, and copper and mercury(II) nitrate are formed. - This reaction can be represented by the following chemical equation: ``` Hg + Cu(NO3)2 -> Cu + Hg(NO3)2 ``` - Similar to the previous example, this reaction is also an example of a single displacement reaction.

в) Cu + Fe2(SO4)3 - A chemical reaction is possible between copper (Cu) and iron(III) sulfate (Fe2(SO4)3). When copper is added to iron(III) sulfate, a displacement reaction occurs, and iron and copper(II) sulfate are formed. - This reaction can be represented by the following chemical equation: ``` 3Cu + 2Fe2(SO4)3 -> 3CuSO4 + 4Fe ``` - Once again, this reaction is an example of a single displacement reaction.

г) Ca + HCl - A chemical reaction is possible between calcium (Ca) and hydrochloric acid (HCl). When calcium is added to hydrochloric acid, a displacement reaction occurs, and calcium chloride and hydrogen gas are formed. - This reaction can be represented by the following chemical equation: ``` Ca + 2HCl -> CaCl2 + H2 ``` - This reaction is an example of a single displacement reaction as well.

In summary, chemical reactions are possible for all the given combinations, resulting in displacement reactions and the formation of new compounds.