ENEM 2019 - Questão 05 - Eletroquímica

CHEMISTRY EXAM RESOLUTION ENEM 2019 (full course) www.professorferretto.com.br INSTAGRAM: @profmichelquimica 05. (Enem 2019) Research groups around the world have been seeking innovative solutions, aiming at the production of devices for the generation of electrical energy. Among them, we can highlight the zinc-air batteries, which combine atmospheric oxygen and zinc metal in an aqueous alkaline electrolyte. The operating diagram of the zinc-air battery is shown in the figure. In battery operation, the chemical species formed at the anode is a) 𝐻2(𝑔) b) 𝑂2(𝑔) c) 𝐻2𝑂(𝓁) d) 𝑂𝐻(𝑎𝑞)^− e) 𝑍𝑛(𝑂𝐻)_4(𝑎𝑞)^(2−)