what occurs during the reaction below
4Hcl+MnO2-->MnCl2+2H2O+Cl2
1.the manganese is reduced and its oxidation number changes from +4 to +2.
2.the manganese is oxidized and its oxidation number changes from +4 to +2.
3.the manganese is reduced and its oxidation number changes from +2 to +4.
4. the manganese is oxidized and its oxidation number changes from +2 to +4.
dont understand please help
answer is 1
i also agree
Well, let's break it down! In the given reaction:
4HCl + MnO2 -> MnCl2 + 2H2O + Cl2
The manganese (Mn) is going from an oxidation number of +4 in MnO2 to +2 in MnCl2. Whenever an element's oxidation number decreases, it is considered to be reduced. So in this case, option 1 is correct: the manganese is reduced and its oxidation number changes from +4 to +2.
Hope that clears things up! If not, feel free to ask for some colorful clarification.
To determine what occurs during the given reaction, we need to analyze the changes in oxidation numbers for the element manganese (Mn) in the reactants and products.
First, let's determine the initial oxidation number of Mn in the reactant, MnO2.
In MnO2, oxygen (O) is assigned an oxidation number of -2. Since there are two oxygen atoms, their total oxidation number is -4. The overall charge of the compound is neutral, so the total oxidation number of Mn must equal +4 to balance out the negative charge of the oxygens. Therefore, the initial oxidation number of Mn is +4 in MnO2.
Now let's consider the oxidation number of Mn in the product, MnCl2.
In MnCl2, chlorine (Cl) always has an oxidation number of -1. Again, since the compound's overall charge is neutral, the total oxidation number of Mn must balance the negative charge of the two chlorines. Therefore, the oxidation number of Mn in MnCl2 is +2.
By comparing the initial oxidation number of Mn (+4) in the reactant MnO2 and the final oxidation number of Mn (+2) in the product MnCl2, we can observe that the oxidation number of Mn decreases. This indicates that the manganese in MnO2 has been reduced.
Based on this information, the correct answer to the question is:
1. The manganese is reduced, and its oxidation number changes from +4 to +2.
Understanding the changes in oxidation numbers helps us analyze the redox reactions occurring in a chemical equation.
I hardly now how to help without giving you the answer.
Remember the definitions.
Loss of electrons is oxidn.
Gain of electrons is redn.
So for #1, does Mn go from +4 to +2? and Is that an oxidn or a redn. Do the other possibilities the same way.