Tính PTK của:
a. H2PO4
b. Na2O
c. Fe(OH)3
d.NH4NO3
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\(PTK_{Mg\left(OH\right)_2}=24+\left(16+1\right).2=58\left(đvC\right)\)
\(PTK_{Ca\left(H_2PO_4\right)_2}=40+\left(1.2+31+16.4\right).2=234\left(đvC\right)\)
\(PTK_{Ba_3\left(PO_4\right)_2}=137.3+\left(31+16.4\right).2=601\left(đvC\right)\)
\(PTK_{Al_2\left(SO_4\right)_3}=27.2+\left(32+16.4\right).3=342\left(đvC\right)\)
\(PTK_{Ca\left(HCO_3\right)_2}=40+\left(1+12+16.3\right).2=162\left(đvC\right)\)
\(PTK_{Fe\left(NO_3\right)_2}=56+\left(14+16.3\right).2=180\left(đvC\right)\)
\(PTK_{Mg\left(OH\right)_2}=24+\left(16+1\right)\cdot2=58\left(đvC\right)\\ PTK_{Ca\left(H_2PO_4\right)_2}=40+\left(2+31+16\cdot4\right)\cdot2=234\left(đvC\right)\\ PTK_{Ba_3\left(PO_4\right)_2}=137\cdot3+\left(31+16\cdot4\right)\cdot2=601\left(đvC\right)\\ PTK_{Al_2\left(SO_4\right)_3}=27\cdot2+\left(32+16\cdot4\right)\cdot3=342\left(đvC\right)\\ PTK_{Ca\left(HCO_3\right)_2}=40+\left(1+12+16\cdot3\right)\cdot2=162\left(đvC\right)\\ PTK_{Fe\left(NO_3\right)_2}=56+\left(14+16\cdot3\right)\cdot2=180\left(đvC\right)\)
C
Fe + H2SO4 --> FeSO4 + H2
Cu(OH)2 + H2SO4 --> CuSO4 + 2H2O
Na2O + H2SO4 --> Na2SO4 + H2O
K2CO3 + H2SO4 --> K2SO4 + CO2 + H2O
C
\(Fe+H_2SO_4\rightarrow FeSO_4+H_2\\ Cu\left(OH\right)_2+H_2SO_4\rightarrow CuSO_4+2H_2O\\ Na_2O+H_2SO_4\rightarrow Na_2SO_4+H_2O\\ K_2CO_3+H_2SO_4\rightarrow K_2SO_4+CO_2+H_2O\)
\(1,\left\{{}\begin{matrix}p=e\\n+p+e=40\\2p-n=12\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}2p+n=40\\2p-n=12\end{matrix}\right.\Leftrightarrow n=\dfrac{40-12}{2}=14\)
\(2,PTK_{Al_2O_3}=2\cdot27+16\cdot3=102\left(đvC\right)\\ PTK_{Al_2\left(SO_4\right)_3}=2\cdot27+\left(32+16\cdot4\right)\cdot3=342\left(đvC\right)\\ PTK_{Fe\left(NO_3\right)_3}=56+\left(14+16\cdot3\right)\cdot3=242\left(đvV\right)\\ PTK_{Na_3PO_4}=23\cdot3+31+16\cdot4=164\left(đvC\right)\\ PTK_{Ca\left(H_2PO_4\right)_2}=40+\left(2+31+16\cdot4\right)\cdot2=234\left(đvC\right)\\ PTK_{Ba_3PO_4}=137\cdot3+31+16\cdot4=506\left(đvC\right)\\ PTK_{ZnSO_4}=65+32+16\cdot4=161\left(đvC\right)\\ PTK_{AgCl}=108+35,5=143,5\left(đvC\right)\\ PTK_{NaBr}=23+80=103\left(đvC\right)\)
a) HBr: axit brom hidric
H2SO3: axit sufurơ
H3PO4: axit photpho ric
H2SO4: axit sufuric (câu này bạn ghi đề sai nhé)
b) Mg(OH)2: Magiê hidroxit
Fe(OH)3: Sắt(III) oxit
Cu(OH)2: Đồng hidroxit
c) Ba(NO3)2: Bari nitrat
Al2(SO4)3: Nhôm sufat
Na2SO3: Natri sufurơ
ZnS: Kẽm sufu
Na2HPO4: Natri hidrophotphat
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
a. PTK H2PO4 = (1 . 2) + 31 + (16 . 4) =97 đvC
b. PTK Na2O = (23 . 2) + 16= 62 đvC
c. PTK Fe(OH)3 = 56 + (16 +1 ) . 3 = 107 đvC
d. PTK NH4NO3 = 14 + (1.4) + 14 + (16 . 3) = 80 đvC
a) M(H2PO4)=1.2+31+16.4=97 đvC
b) M(Na2O)=23.2+16=62 đvC
c)M Fe(OH)3=56+3(1+16)=107 đvC
d)M NH4NO3= 14+1.4+14+16.3=80 đvC