\(K_2O:\) oxit bazo: kali oxit

\(Mg\left(OH\right)_2:\) bazo: magie hidroxit

\(H_2SO_4:\) axit: axit sunfuric

\(AlCl_3:\) muối: nhôm clorua

\(Na_2CO_3:\) muối: natri cacbonat

\(CO_2:\) oxit axit: cacbon đioxit

\(Fe\left(OH\right)_3:\) bazo: sắt (lll) hidroxit

\(HNO_3:\) axit: axit nitric

\(K_3PO_4:\) muối: kali photphat

\(HCl:\) axit: axit clohidric

\(H_2S:\) axit: axit sunfuro

\(CuO:\) oxit bazo: đồng (ll) oxit

\(Ba\left(OH\right)_2\): bazo: bari hidroxit

PTHH (1), (2), (3), (5), (8) đã cân bằng

\(\left(4\right)Ca\left(OH\right)_2+H_2SO_4\rightarrow CaSO_4+2H_2O\)

\(\left(6\right)Al\left(OH\right)_3+3HCl\rightarrow AlCl_3+3H_2O\)

\(\left(7\right)MnO_2+4HCl\rightarrow MnCl_2+Cl_2+2H_2O\)

\(\left(9\right)P_2O_5+3H_2O\rightarrow2H_3PO_4\)

\(\left(10\right)2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)

CaO + CO₂ → CaCO₃

CaO + H₂O → Ca(OH)₂

CaCO₃ + H₂O + CO₂ → Ca(HCO₃)₂

Ca(OH)₂ + H₂SO₄ → CaSO₄ + 2H₂O

Fe + H₂SO₄ → FeSO₄ + H₂

2Al(OH)₃ + 6HCl → 2AlCl₃ + 6H₂O

MnO₂ + 4HCl → MnCl₂ + Cl₂ + 2H₂O

H₂SO₄ + Na₂CO₃ → Na₂SO₄ + CO₂ + H₂O

P₂O₅ + 3H₂O → 2H₃PO₄

2Fe(OH)₃ \(\underrightarrow{to}\) Fe₂O₃ + 3H₂O

Đơn chất:

-Phi kim:

+He->4(đvC)

+Cl2->35,5*2=71(đvC)

+F2->19*2=38(đvC)

+Br2->80*2=160(đvC)

-Kim loại:

+Ag->108(đvC)

+Fe->56(đvC)

Hợp chất:

-CO2->12+16*2=44(đvC)

-K2PO4->39*3+31+16*4=212(đvC)

-BaSO4->137+32+16*4=233(đvC)

-CuSO4->64+32+16*4=160(đvC)

-FeCl2->56+71=127(đvC)

-Na2O->62(đvC)

-HCl->36,5(đvC)

-H2S->34(đvC)

-Mg(NO3)3->148(đvC)

-Al(NO3)3->213(đvC)

-CaCO3->100(đvC)

-Ba(OH)2->172(đvC)

-H2SO4->98(đvC)

-KClO3->122,5(đvC)

-HBr->81(đvC)

-CaClO->91,5(đvC)

Oxit bazo : \(CaO,Na_2O\)

Oxit axit : \(SO_2,SO_3,N_2O_5\)

Axit : \(HNO_3,HNO_2\)

Bazo : \(Fe(OH)_3,Al(OH)_3\)

Muối : \(FeS,CaSO_3,KHCO_3,FeHPO_4,Fe(NO_3)_2,Fe(NO_3)_3,NaH_2PO_4,Na_2HPO_4\)

\(\text{Oxit axit : }\) \(SO_2,SO_3,N_2O_5\)

\(\text{Oxit bazo : }\)\(CaO,Na_2O\)

\(\text{Axit : }\)\(HNO_3,HNO_2\)

\(\text{Bazo : }\)\(Fe\left(OH\right)_3,Al\left(OH\right)_3\)

\(\text{Muối : }\) \(FeS,CaSO_3,KHCO_3,FeHPO_4,Fe\left(NO_3\right)_2,Fe\left(NO_3\right)_3,NaH_2PO_4,NaHPO_4\)

\(Oxitbazo:CuO,Fe_2O_3\\ Oxitaxit:SO_3,SO_2\\Bazo:NaOH,Fe\left(OH\right)_2,KOH,Mg\left(OH\right)_2\\ Axit:HCl,H_3PO_4,H_2SO_4\\ Muối:KNO_3,BaCl_2,CuSO_4,CaCl_2\)

Oxit: \(CuO,SO_3,SO_2,Fe_2O_3\)

Axit: \(HCl,H_3PO_4,H_2SO_4\)

Bazơ: \(NaOH,Fe\left(OH\right)_2,KOH,Mg\left(OH\right)_2\)

Muối: \(KNO_3,BaCl_2,CuSO_4,CaCl_2\)

M : Mg(HCO₃)₂ : magiê hidrocabonat

Fe₂(SO₄)₃: sắt III sunfat

OB: Fe₂O₃ : sắt III oxit

BZ: Ca(OH)₂: canxi hidroxit

\(\%Ca=\dfrac{40}{40+2\left(31+16\cdot4\right)}\cdot100\approx17,39\%\)

\(\%Ca=\dfrac{40}{40+2\left(2+31+16\cdot4\right)}\cdot100\approx17,09\%\)

\(\%Ca=\dfrac{40}{40+2\left(1+12+16\cdot3\right)}\cdot100\approx24,69\%\)

$\rm u)S + 2HNO_3 \rightarrow H_2SO_4 + 2NO \uparrow$

$\rm v)3Ba(NO_3)_2 + Al_2(SO_4)_3 \rightarrow 3BaSO_4 \downarrow + 2Al(NO_3)_3$
$\rm w)3Ba(OH)_2 + P_2O_5 \rightarrow Ba_3(PO_4)_3 \downarrow + 3H_2O$
$\rm x)2Fe_2O_3 + 3C \xrightarrow{t^o} 4Fe + 3CO_2 \uparrow$

Cân bằng PTHH: