Question

Перепишите приведённые ниже схемы уравнений реакций,вместо знаков вопроса напишите формулы соответствующих веществ, расставьте коэффиценты и поясните, к какому типу относится каждая из указанных реакций: Zn + ? -> ZnO; Al(OH)3 -> Al2O3 + ?; Mg + HCl -> MgCl2 + ?; Fe + ? -> FeCl3; Au2O3 -> Au + ?; Al + CuCl2 -> Cu + ? ;

Answer 1

2Zn + O2 -> 2ZnO;

2Al(OH)3 -> Al2O3 + 3H20;

Mg + 2HCl -> MgCl2 + H2;

2Fe + 3Cl2->2 FeCl3;

2Au2O3 -> 2Au + 3O2;

2Al + 3CuCl2 ->3 Cu + 2AlCl3

Answer 2

Balancing Chemical Equations and Identifying Reaction Types

Let's rewrite the given chemical equations, balance the equations, and identify the type of each reaction.

1. Zn + ? -> ZnO - This equation represents the reaction between zinc (Zn) and an unknown substance to form zinc oxide (ZnO). - To balance the equation, we need to ensure that the number of atoms on both sides of the equation is equal. - The balanced equation is: Zn + O2 -> ZnO. - This is a combination reaction where two or more substances combine to form a single product.

2. Al(OH)3 -> Al2O3 + ?? - This equation represents the decomposition of aluminum hydroxide (Al(OH)3) to form aluminum oxide (Al2O3) and an unknown substance. - To balance the equation, we need to ensure that the number of atoms on both sides of the equation is equal. - The balanced equation is: 2Al(OH)3 -> Al2O3 + 3H2O. - This is a decomposition reaction where a single compound breaks down into two or more simpler substances.

3. Mg + HCl -> MgCl2 + ?? - This equation represents the reaction between magnesium (Mg) and hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and an unknown substance. - To balance the equation, we need to ensure that the number of atoms on both sides of the equation is equal. - The balanced equation is: Mg + 2HCl -> MgCl2 + H2. - This is a single replacement reaction where one element replaces another element in a compound.

4. Fe + ?? -> FeCl3 - This equation represents the reaction between iron (Fe) and an unknown substance to form iron(III) chloride (FeCl3). - To balance the equation, we need to ensure that the number of atoms on both sides of the equation is equal. - The balanced equation is: 2Fe + 3Cl2 -> 2FeCl3. - This is a combination reaction where two or more substances combine to form a single product.

5. Au2O3 -> Au + ?? - This equation represents the decomposition of gold(III) oxide (Au2O3) to form gold (Au) and an unknown substance. - To balance the equation, we need to ensure that the number of atoms on both sides of the equation is equal. - The balanced equation is: 2Au2O3 -> 4Au + 3O2. - This is a decomposition reaction where a single compound breaks down into two or more simpler substances.

6. Al + CuCl2 -> Cu + ?? - This equation represents the reaction between aluminum (Al) and copper(II) chloride (CuCl2) to form copper (Cu) and an unknown substance. - To balance the equation, we need to ensure that the number of atoms on both sides of the equation is equal. - The balanced equation is: 2Al + 3CuCl2 -> 3Cu + 2AlCl3. - This is a single replacement reaction where one element replaces another element in a compound.

I hope this helps! Let me know if you have any further questions.