1)Hiện Tượng:bột CuO tan ra, dd từ ko màu chuyển thành màu xanh lam

\(2HCl+CuO\rightarrow CuCl_2+H_2O\)

2)Hiện tượng Vôi sống nhão ra, phản ứng toả nhiệt

\(CaO+H_2O\rightarrow Ca\left(OH\right)_2\)

3)Hiện Tượng mẩu Cu tan dần, có bọt khí thoát ra, dung dịch sau phản ứng có màu xanh lam.

\(2H_2SO_4+Cu\rightarrow CuSO_4+SO_2+2H_2O\)

Oxit Axit

+SO2:Lưu huỳnh đi oxit

+SO3;lưu huỳnh trioxit

+P205:Đi photpho pentaoxit

+CO:Cacbon oxit

Oxit bazo:

+FeO: Sắt (III) oxit

+K2O:kali oxit

+Na2O:natri oxit

+BaO:bari oxit

+CaO:canxi oxit

+Al2O3;Nhôm oxit

Bazo:

+Mg(OH)2: Magie hidroxit

+NaOH:Natri hidroxit

Axit

+HCl;Axít clohiđric

+HNO3:Axit nitric

Muối

+CaCO3; canxicacbonat

B)\(FeO+H_2O\rightarrow Fe\left(OH\right)_2\)

\(K_2O+H_2O\rightarrow2KOH\)

\(H_2O+SO_2\rightarrow H_2SO_3\)

\(H_2O+SO_3\rightarrow H_2SO_4\)

\(H_2O+BaO\rightarrow Ba\left(OH\right)_2\)

\(3H_2O+P_2O_5\rightarrow2H_3PO_4\)

\(H_2O+CO\rightarrow H_2+CO_2\)

\(H_2O+CaO\rightarrow Ca\left(OH\right)_2\)

\(3H_2O+Al_2O_3\rightarrow2Al\left(OH\right)_3\)

\(FeO+2HCl\rightarrow FeCl_2+H_2O\)

\(K_2O+2HCl\rightarrow2KCl+H_2O\)

\(Na_2O+2HCl\rightarrow2NaCl+H_2O\)

\(BaO+2HCl\rightarrow BaCl_2+H_2O\)

\(CaO+2HCl\rightarrow CaCl_2+H_2O\)

\(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

Đổi 100ml=0,1l

\(Al+2HCl\rightarrow AlCl_2+H_2\)

tl1........2.............1..........1.(mol)
Br0,15...0,3......0,15.....0,15(mol)

\(n_{HCl}=C_M.Vdd=0,1.3=0,3\left(mol\right)\)

\(m_{Al}=n.M=0,15.27=4,05\left(g\right)\)

\(V_{H_2}=n.22,4=3,36\left(l\right)\)

a)\(CaSO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)

tl 1..................2............1.............1..........1(mol)

br0,125........0,25......0,125........0,125....0,125(mol)

\(m_{CaSO_3}=\dfrac{15}{120}=0,125\left(mol\right)\)

\(\Rightarrow VddHCl=\dfrac{n}{C_M}=\dfrac{0,25}{1}=0,25\left(l\right)\)

\(\Rightarrow C_{MCaCl_2}=\dfrac{0,125}{0,25}=0,5\left(M\right)\)

\(CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\)

Tl1............1.................1................1.(mol)

Br0,4...........................0,4....................(mol)

\(n_{CO_2}=\dfrac{9,916}{24,79}=0,4\left(mol\right)\)

\(\Rightarrow m_{CaCO_3}=n.M=0,4.100=40\left(g\right)\)

Gọi Kim loại Đó là A

\(A+2HCl\rightarrow ACl_2+H_2\)

tl1.......2.............1...........1(mol)

br  0,15....0,3.....0,15.....0,15(mol)                                 

\(n_{H_2}=\dfrac{V}{22,4}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)

\(M_A=\dfrac{m}{n}=\dfrac{3,6}{0,15}=24\left(\dfrac{g}{mol}\right)\)

Vậy A là Magie(Mg)

\(\)\(n_{K_2CO_3}=0,1.0,1=0,01\left(mol\right)\)

\(n_{HNO_3}=0,2.0,2=0,04\left(mol\right)\)

PTHH:\(K_2CO_3+2HNO_3\rightarrow2KNO_3+CO_2+H_2O\)

\(n_{HNO_3Pứng}=n_{KNO_3}=2n_{K_2CO_3}=2.0,01=0,02\left(mol\right)\)

\(n_{HNO_3Dư}=0,04-0,02=0,02\left(mol\right)\)

\(VddB=0,1+0,2=0,3\left(l\right)\)

\(C_{MHNO_3Dư}=\dfrac{0,02}{0,3}=\dfrac{1}{15}\left(M\right)\)

\(C_{MKNO_3}=\dfrac{0,02}{0,3}=\dfrac{1}{15}\left(mol\right)\)

A nha 2,24

1. “ Why don’t you put better lock on the door, Barbara”? said John

=> John suggested Barbara to put better lock on the door

2. Although his both legs were broken in the crash, he managed to get out of the car before it exploded.

=> Despite his both broken legs, he managed to get out of the car before it exploded

3. I haven’t eaten this kind of food before.

=> This is the first time I've eaten this kind of food

4. The architect has drawn plans for an extension to the house.

=> Plans for an extension to the house has been drawn by the architect

5. It isn’t necessary for you to finish by Saturday

=> You needn't finish by Saturday

6. “ How many survivors are there?”, asked the journalist.

=> The journalist wanted to know how many survivors there were

7. It was such rotten meat that it had to be thrown away.

=> The meat was so rotten that it had to be thrown away

8. It is essential that Professor Van Helsing is met at the airport.

=> Professor Van Helsing must be met at the airport

9. You can’t visit the USA unless you have a visa.

=> If you have a visa, you can visit the USA

10. “ Can I borrow your typewriter, Janet”? asked Peter.

=> Peter asked if he could borrow Janet's typewrite

11. She started working as a secretary five years ago.

=> She has been working as a secretary for five years

12. She knows a lot more about it than I do.

=> I don’t know as much about it as she does

13. My French friend finds driving on the left difficult.

=> My French friend isn’t used to driving on the left

14. They think the owner of the house is abroad.

=> The owner of the house is thought to be abroad

15. We didn’t go on holiday because we did not have enough money.

=> If we had had enough money, we would have gone on holiday

16. The children couldn’t go swimming because the sea was rough.

=> The sea was too rough for the children to go swimming

17. The mechanic serviced my car last week.

=> I had the mechanic service my car last week

18. I’m always nervous when I travel by air.

=> Traveling by air always makes me nervous

19. He couldn’t afford to buy the car.

=> The car was too expensive for him to buy

20. “Why don’t you put your luggage under the seat?” he asked.

=> He suggested me to put my luggage under the seat

A là CuO

B là Fe(OH)2

C là MgO

D là Zn

H2SO4 đặc: C12H22O11

\(4FeS_2+11O_2\rightarrow2Fe_2O_3+8SO_2\)

\(2SO_2+O_2\rightarrow2SO_3\)

\(H_2O+SO_3\rightarrow H_2SO_4\)

\(H_2SO_4\rightarrow H_2+4SO\)

\(4H_2+Fe_2O_3\rightarrow4H_2O+3Fe\)

\(2Fe+6H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O+6SO_2\)

\(SO_2+CaO\rightarrow CaSO_3\)