Để khử ion Cu²⁺ trong dung dịch CuSO₄ có thể dùng kim loại nào?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the word that has the underlined part pronounced differently from the rest:  

  though                comb                  only              gone

• Choose the word that has the underlined part pronounced differently from the rest:  

  danger               angel                  anger               magic

• Choose the word that has the underlined part pronounced differently from the rest:  

  trivial            rivalry              minority               sign

• Choose the word that has the underlined part pronounced differently from the rest:  

  suitable              biscuit                 guilty               building

• Choose one sentence that has the same meaning as the root one:

  The cinema was open until midnight and the theatre until ten.
   

• Choose one sentence that has the same meaning as the root one:

  Fred was angry. He left without saying goodbye to anyone.
   

• Choose one sentence that has the same meaning as the root one:

  The rain is starting to let up a little.
   

• Choose one sentence that has the same meaning as the root one:

  The sooner you stop drinking, the better you’ll feel.
   

• Choose the word that has the underlined part pronounced differently from the rest:  

  creature           creative             cream               cease

• Choose the word that has the underlined part pronounced differently from the rest:  

  police             service                machine              miner