The reactants of two reactions are shown, Reaction 1: C and O2
Reaction 2: K2SO4, and CaCl,
Which reaction is likely to be a redox reaction? (1 point)
Only Reaction 2, because potassium and calcium ions will interchange their positions
Both, because the electrostatic charge on cations will change during each reaction
Both, because the electrostatic charge on anions will change during each reaction
Only Reaction 1, because the charge of carbon changes during the reaction

Only reaction 1

Explanation:

C + O2 → CO

the charge of C in CO is +2 (oxidation)

from 0 to +2

the charge of O in CO is -2 (reduction)

from 0 fo -2

Hence it is a redox (reduction-oxidation) reaction

This is also valid for,

C + O2 → CO2

the charge of C in CO2 is +4 (oxidation)

charge increases from 0 to +4

the charge of O in CO2 is -2 (reduction)

charge decreases from 0 to -2

hence, it is a redox reaction

K2SO4 + CaCl → KCl + CaSO4

none of the charges changes in this reaction

please recheck, for this may not be the correct answer

your answer would be a. 12.5 kg