Which of the following is a single replacement reaction?Fe2O3 + 3H2O yields 2Fe(OH)3 FeS + 2HCl yields FeCl2 + H2S 2Mg + O2 yields 2MgO Mg + 2HCl yields MgCl2 + H2

Question

asked Apr 20, 2017 61.7k views

2 Answers

Mohamed Sahir · Answer 1 · 2017-04-27T03:34:17+0000

Answer:
$Mg+2HCl\rightarrow MgCl_2+H_2$

Step-by-step explanation:

1. Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.

Example:
$Fe_2O_3+3H_2O\rightarrow 2Fe(OH)_3$

$2Mg+O_2\rightarrow 2MgO$

2. Double displacement reaction is one in which exchange of ions take place.

Example:
$FeS+2HCl\rightarrow FeCl_2+H_2S$

3. Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.

Example:
$Mg+2HCl\rightarrow MgCl_2+H_2$