-MÉTODO DAS TETATIVAS

01. Aplicando o método das tentativas, acerte os coeficientes das equações abaixo:a) H 3PO 4+KOH→K3 PO 4+H 2O

b) Pb ¿

c) Al2 ¿

d) PCl5+H 2O→H 3PO4+HCl

e) N2+H 2→NH 3

f) Fe+O2→Fe2O3

g) Al(OH )3+H 4 P2O7→Al4 ¿¿

h) Cr3O3+C→CO+Cr

i) Fe2O4+Al→Al2O3+Fe

j) As+NaOCl+H 2O→H 3 AsO4+NaCl

-MÉTODO ALGÉBRICO

01. Balancei as equações seguintes pelo método algébrico:a) CH 3NO2+Cl2→CCl3NO2+HC l

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b) Al+Cr2O3→Al2O3+Cr________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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c) CaH 2+H 2O→Ca(OH )2+H 2

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d) Cr2¿¿____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

e) Pb ¿¿____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

f) CaO+B2O3→Ca3 ¿¿____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

g) MnO2+HCl→MnCl2+Cl2+H 2O

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h) HCl+Na2CO3→NaCl+CO2+H 2O

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i) Sn+NaOH+H2O→Na2SnO3+H 2

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j) H 3PO 4+Ca(OH )2→Ca3 ¿¿____________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

-MÉTODO OXI-REDUÇÃO

01. Acerte pelo método redox, os coeficientes das equações abaixo:a) P+HNO3+H 2O→H 3PO4+NO

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b) HIO3+HI→ I 2+H 2O

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c) KMnO4+FeSO4+H 2SO4→K 2SO4+MnSO4+Fe2 ¿¿________________________________________________________________________________________________________________________________

d) MnO2+NaI+H 2SO4→Na2SO4+MnSO4H 2O+ I 2________________________________________________________________________________________________________________________________

e) Bi2O3+NaClO+NaOH→NaBiO3+NaCl+H 2O

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f) MnO2+HCl→MnCl2+H 2O+Cl2________________________________________________________________________________________________________________________________

g) KMnO4+HCl→KCl+MnCl2+H 2O+Cl2________________________________________________________________________________________________________________________________

h) Hg+HNO3→Hg ¿¿________________________________________________________________________________________________________________________________

i) CuS+HNO3→Cu ¿¿________________________________________________________________________________________________________________________________

j) K2Cr2O7+H 2O2+H 2SO4→K2SO 4+Cr2 ¿¿

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