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6-tajriba. Protektor himoya. Ikkita stakanga sulfat kislotaning 0.2 n. Eritmasidan 15 – 20 ml dan va qizil qon tuzi eritmasidan ikki tomchidan quying. Bitta stakanga o’zaro birlashtirilmagan qalaylangan temir plastinka bilan rux plastinkani, ikkinchisiga esa tashqi zanjir (sim) orqali huddi shunday plastinkalarni tushuring.
Qaysi stakandagi temir korroziyalanadi? Boshqa stakandagi temirning korroziyasiga uchramasligini qanday tushuntirish kerak? Ikkinchi holdagi katod va anodni aytib bering.
7-tajriba Ingibitorning ta’siri. Uchta stakanda bir vaqtda uchta tajriba o’tkazing. Birinchi stakanga sulfat kislotaning 0.2 n. eritmasidan 15 – 20 ml quying, 1 – 2 tomchi qizil qon tuzi eritmasidan qo’shib, unga oldindan xlorid kislota bilan ishlov berilgan temir plastinkani tushuring.
Ikkinchi stakanga sulfat kislotaning 0.1 n. Eritmasidan 15 – 20 ml quying, qizil qon tuzi eritmasidan ikki tomchi va ingibitor eritmasidan ikki tomchi qo’shing. Avvalgidek ishlangan temir plastinkani tushuring.
Ikkinchi stakanga nima solgan bo’lsangiz uchunchi stakanga ham o’shani soling, lekin ishlov berilgan temir plastinka o’rniga zanglagan temir plastinka oling. Har bir stakanda ko’k rangni paydo bo’lish vaqtini va uning qanchalik to’q yoki ochligini aniqlang.
Sodir bo’lgan reaksiya tenglamalarini yozing. Izoh bering.
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