in the reaction mg + 2hcl → mgcl₂ + h₂ which elements oxidation number does not change?\no cl\no mg\no h
in the reaction mg + 2hcl → mgcl₂ + h₂ which elements oxidation number does not change?\no cl\no mg\no h
Answer
Explanation:
Step1: Determine initial oxidation numbers
In Mg, oxidation number of Mg is 0 (element in free - state). In HCl, H has oxidation number +1 and Cl has oxidation number -1.
Step2: Determine final oxidation numbers
In MgCl₂, Mg has oxidation number +2 and Cl has oxidation number -1. In H₂, H has oxidation number 0.
Step3: Analyze changes
Oxidation number of Mg changes from 0 to +2. Oxidation number of H changes from +1 to 0. Oxidation number of Cl remains -1 throughout the reaction.
Answer:
A. Cl