91影视

Write the net ionic equations for these reactions: a. \(\mathrm{Zn}(s)+\mathrm{CuCl}_{2}(a q) \longrightarrow \mathrm{Cu}(s)+\mathrm{ZnCl}_{2}(a q)\) b. \(\mathrm{Ba}\left(\mathrm{NO}_{3}\right)_{2}(a q)+\mathrm{CuSO}_{4}(a q) \longrightarrow \mathrm{BaSO}_{4}(s)+\mathrm{Cu}\left(\mathrm{NO}_{3}\right)_{2}(a q)\)

Draw shell models for silicon and oxygen atoms to show the transfer of electrons during oxidation.

If cobalt ions are replaced by iron to form iron ions and solid cobalt, is cobalt above or below iron in the activity series? Explain.

What are the pros and cons of using electrochemistry as a source of energy?

Research common batteries, such as AA or D cell batteries, to i nd out the chemistry behind them. List the metals and compounds commonly used in their construction.

Explain why metals that are easily oxidized are not found in nature in their pure forms. Name two of these metals.

Car batteries are usually 12-volt. Research car batteries and describe how such a high voltage is achieved.

When car lights are let on for a long time, this can cause a 鈥渄ead鈥� battery, which will require a jump-start from another car battery. In chemical terms, what does it mean to have a 鈥渄ead鈥� car battery? What does 鈥渏ump-starting鈥� a car battery mean in terms of the overall redox reaction? Research and report on your i ndings.

Research how one of the metals of antiquity was extracted from metal compounds dug out of the Earth. Describe the process and draw a sketch.

Explain what is oxidized and what is reduced when copper reacts with oxygen to form copper (II) oxide, CuO.