có bọt khí xung quanh viên kẽm (rất nhiều bọt khí, Zn phản ứng khá mạnh với HCl), và các bọt khí này thoát ra, bay lên, dung dịch sủi bọt. Viên kẽm tan dần
There are air bubbles around the zinc Tablet (lots of air bubbles, Zn react quite strongly with HCl), and this gas to escape, climb, effervescent solution. Zinc tablets dissolve slowly
Members have air bubbles around zinc (large amounts of bubbles, Zn reacts strongly with HCl), and the gas bubbles escaping, soaring, effervescent solution. Zinc melting member