Bài 7: Tính PTK các chất có CTHH sau
a/ Al(OH)3
b/ Ca3(PO4)2
c/ Mg(NO3)2
d/ Fe(OH)2
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a) BaO: 153 đvC
b) Al2O3: 102 đvC
c) P2O5: 142 đvC
d) HNO3: 63 đvC
e) Fe2(SO4)3: 400 đvC
f) Na3PO4: 164 đvC
g) Mg(OH)2: 58 đvC
h) K2CO3: 138 đvC
a)\(BaO\Rightarrow PTK=137+16=153\left(đvC\right)\)
b)\(Al_2O_3\Rightarrow PTK=2\cdot27+3\cdot16=102\left(đvC\right)\)
c)\(P_2O_5\Rightarrow PTK=2\cdot31+5\cdot16=142\left(đvC\right)\)
d)\(HNO_3\Rightarrow PTK=1+14+3\cdot16=63\left(đvC\right)\)
f)\(Na_3PO_4\Rightarrow PTK=3\cdot23+31+4\cdot16=164\left(đvC\right)\)
e)\(Fe_2\left(SO_4\right)_3\Rightarrow PTK=2\cdot56+3\cdot32+12\cdot16=400\left(đvC\right)\)
g)\(Mg\left(OH\right)_2\Rightarrow PTK=24+2\cdot16+2=58\left(đvC\right)\)
h)\(K_2CO_3\Rightarrow PTK=2\cdot39+12+3\cdot16=138\left(đvC\right)\)
\(\text{Oxit:}\)
\(-Al_2O_3:\)\(\text{Nhôm oxit}\)
\(-BaO:\) \(\text{Bari oxit}\)
\(-ZnO:\) \(\text{Kẽm oxit}\)
\(-MgO:\) \(\text{Magie oxit}\)
\(\text{Axit:}\)
\(-H_3PO_4:\) \(\text{Axit photphoric}\)
\(-H_2S:\) \(\text{Axit sunfua}\)
\(\text{Bazo: }\)
\(-Cu\left(OH\right)_2:\) \(\text{Đồng (II) hidroxit }\)
\(-KOH:\) \(\text{Kali hidroxit }\)
\(-Fe\left(OH\right)_3:\) \(\text{Sắt (III) hidroxit }\)
\(-Al\left(OH\right)_3:\) \(\text{Nhôm hidroxit }\)
\(-Ca\left(OH\right)_2:\) \(\text{Canxi hidroxit }\)
\(\)\(\text{Muối: }\)
\(-ZnCl_2:\) \(\text{Kẽm clorua}\)
\(-FeS:\) \(\text{Sắt (II) sunfua}\)
\(-AlCl_3:\) \(\text{Nhôm clorua}\)
\(-MgSO_4:\) \(\text{Magie sunfat }\)
\(-Na_2HPO_4:\) \(\text{Natri hiđrophotphat}\)
\(-CaCO_3:\) \(\text{Canxi cacbonat}\)
\(-CuSO_4:\) \(\text{Đồng (II) sunfat }\)
\(-BaSO_3:\) \(\text{Bari sunfit}\)
\(-Ca_3\left(PO_4\right)_2:\) \(\text{Canxi photphat }\)
\(-NaHCO_3:\) \(\text{Natri hiđrocacbonat}\)
\(-CaSO_3:\) \(\text{Canxi sunfit }\)
\(-ZnSO_4:\) \(\text{Kẽm sunfat }\)
1) Bari nitrat
2) Canxi clorua
3) Kẽm sunfat
4) Canxi photphat
5) Đồng (II) hidroxit
6) Natri sunfat
7) Kali sunfua
8) Đồng (II) oxit
9) Thủy ngân (II) oxit
10) SO3: Lưu huỳnh trioxit
1. \(2Al+3Fe\left(NO_3\right)_2\rightarrow2Al\left(NO_3\right)_3+3Fe\)
2. \(P_2O_5+3Ba\left(OH\right)_2\rightarrow Ba_3\left(PO_4\right)_2+3H_2O\)
3. \(Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)
4. \(Al_2\left(SO_4\right)_3+3Ca\left(OH\right)_2\rightarrow3CaSO_4+2Al\left(OH\right)_3\)
5. \(Fe_3O_4+8HCl\rightarrow FeCl_2+2FeCl_3+4H_2O\)
6. \(Mg\left(NO_3\right)_2\underrightarrow{t^o}MgO+2NO_2+\dfrac{1}{2}O_2\)
7. \(2xFe+yO_2\underrightarrow{t^o}2Fe_xO_y\)
8. \(CH_4+2O_2\underrightarrow{t^o}CO_2+2H_2O\)
9. \(C_2H_6O+3O_2\underrightarrow{t^o}2CO_2+3H_2O\)
Bạn tham khảo nhé!
\(1.Al+Fe\left(NO_3\right)_2--->Al\left(NO_3\right)_2+Fe\)
\(2.P_2O_5+3Ba\left(OH\right)_2--->Ba_3\left(PO_4\right)_2+3H_2O\)
\(3.Al\left(OH\right)_3+3HCl--->AlCl_3+3H_2O\)
\(4.Al_2\left(SO_4\right)_3+3Ca\left(OH\right)_2--->3CaSO_4+2Al\left(OH\right)_3\downarrow\)
\(5.Fe_3O_4+8HCl--->FeCl_2+2FeCl_3+4H_2O\)
\(6.2Mg\left(NO_3\right)_2\overset{t^o}{--->}2MgO+4NO_2+O_2\)
\(7.xFe+\dfrac{y}{2}O_2\overset{t^o}{--->}Fe_xO_y\)
\(8.CH_4+2O_2\overset{t^o}{--->}CO_2+2H_2O\)
\(9.C_2H_6O+3O_2\overset{t^o}{--->}2CO_2+3H_2O\)
a) Fe hóa trị II
Al hóa trị III
b) NO3 hóa trị I
PO4 hóa trị III
â) 78
b) 310
c) 148
d) 90
a/ Al(OH)3 = 27+17.3 = 78
b/ Ca3(PO4)2 = 40.3+2.(31+16.4) = 310
c/ Mg(NO3)2 = 24+2.(14+16.3) = 148
d/ Fe(OH)2 = 56+17.2 = 90