1.Mô tả sơ đồ điều chế NaOH 2.Thực hiện dãy chuyển đổi hóa học Al → $Al_{2}$ $O_{3}$ → $AlCl_{3}$ → Al$(OH)_{3}$ → $Al_{2}$$O_{3}$ → $Al_{2}$ $(SO_{4})$ $_{3}$ 3.Cho 100 ml dd $H_{2}$ $SO_{4}$ 0,1 M tác dụng với 200 ml dd NaOH. Sau phản ứng chất nào còn thừa .......

1 câu trả lời

1) 2 NaCl +2 H2O --> 2NaOH + H2 + Cl2 ( đpdd có màng ngăn)

2)         4Al+  3O2 --> 2Al2O3         to

             Al2O3 + 6HCl--> 2AlCl3 + 3H2O 

              AlCl3 + 3NaOH--> Al(OH)3 + 3NaCl

             2 Al(OH)3--> Al2O3 +3 H2O      to

             Al2O3+3H2SO4--> Al2(SO4)3 + 3H2O

3)       H2SO4 + 2NaOH --> Na2SO4 + 2H2O

 

            nH2SO4 = 0,1*0,1=0,01 mol      ( thiếu dữ kiện ak bạn )  

Câu hỏi trong lớp Xem thêm

Combine the two sentences into one. Using where, when. …………………………………………………………………………………… 2. I’ll never forget the day. I met you on that day. …………………………………………………………………………………… 3. The city was beautiful. We spent our vacation in that city. …………………………………………………………………………………… 4. Monday is the day. We will come on that day. …………………………………………………………………………………… 5. That is the restaurant. I will meet you at that restaurant. …………………………………………………………………………………… 6. 7:05 is the time. My plane arrives at that time. …………………………………………………………………………………… 7. The town is small. I grew up in that town. …………………………………………………………………………………… 8. That is the drawer. I keep my jewelry in that drawer. …………………………………………………………………………………… 9. 1960 is the year. The revolution took place in that year. …………………………………………………………………………………… 10. July is the month. The weather is usually hot in that month. ……………………………………………………………………………………

5 lượt xem
1 đáp án
4 giờ trước