In the unbalanced equation below, what element is being reduced? mno2 + hcl → h2o + mncl2 + cl2 a. mn b. cl c. o d. h

Manganese is reduced from MnIV+ to MnII+, so option A.

And of course, for every reduction there is a corresponding oxidation: here, chloride ion is oxidized to zerovalent chlorine gas.

The overall (balanced) redox equation is:

MnO2(s)+4HCl(aq)→MnCl2(s)+Cl2(g)+2H2O(l)

chemical properties are the characteristic of matter which can only be observed by changing the chemical identity of a sample like flammability reactivity and toxicity.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.