QUÍMICA ENEM 2019! "Para realizar o desentupimento de tubulações de esgotos residenciais..."

Hello, my dears! In this video, we'll be solving question 91 from the ENEM 2019 blue booklet! To unclog residential sewage pipes, a commercial solid mixture containing sodium hydroxide (NaOH) and another pulverized chemical species is used. When water is added to this mixture, a reaction occurs that releases hydrogen gas and energy in the form of heat, increasing the efficiency of the unclogging process. Consider the standard reduction potentials (E°) of water and other species in a basic medium, shown in the table. What other species is present in the composition of the commercial solid mixture to increase its efficiency? a) Al b) Co c) Cu(OH)2 d) Fe(OH)2 e) Pb The Chemistry Room channel has content designed for students who struggle with this subject! Simple, clear, and easy-to-understand explanations! If CHEMISTRY is the terror of your studies, it's time to change that perception!!! Guys, don't forget to subscribe to the channel, leave a comment and like the videos, and share them with your friends who are "zeroes" in chemistry! My goal is to bring free, quality basic content to students in Brazil! TMJ!!!! Instagram: professordiegofares #enem2019 #resolucaoenem2019 #enemdigital