Объяснение:
Mr(Ba(NO3)2) = 137 + 14*2 + 16*6 = 261
W(O) = Ar(O) *n / Mr(Ba(NO3)2) *100% = 16*6 / 261 *100% =37%
Mr(Ca3(PO4)2 =40*3 + 31*2 + 16*8 =310
W(O) = Ar(O) *n / Mr(Ca3(PO4)2) *100% = 16*8 / 310 *100% =41%
Mr(Al2(SO4)3) = 27*2+32*3 +16*12 =342
W(O) = Ar(O) *n / Mr(Al2(SO4)3) *100% = 16*12 / 342 *100% =56%
Mr(Ca(NO3)2 = 40 + 14*2 + 16*6 =164
W(O) = Ar(O) *n / Mr(Ca(NO3)2 *100% = 16*6 / 164 *100% = 58,5%
Mr(Na2SO4) = 23*2 + 32 + 16*4 = 142
W(Na) = Ar(Na) *n / Mr(Na2SO4) *100% = 23*2 / 142 *100% =32%
W(S) = Ar(S) *n / Mr(Na2SO4) *100% = 32*1 / 142 *100% =22%
W(O) = Ar(O) *n / Mr(Na2SO4) *100% = 16*4 / 142 *100% =46%
Mr(Ba(NO3)2) = 137 + 14*2 + 16*6 = 261
W(Ba) = Ar(Ba) *n / Mr(Ba(NO3)2) *100% = 137 *1 / 261 *100% = 52%
W(N) = Ar(N) *n / Mr(Ba(NO3)2 *100% = 14*2 / 261 *100% =11%
W(O) = Ar(O) *n / Mr(Ba(NO3)2) *100% = 16*6 / 261 *100% = 37%
+ - + 2- + 2-
1)2KOH+H2SO4=K2SO4+2H2O
+ - + 2- + 2-
2K+2OH+2H+SO4=2K+SO4+2H2O
+ -
2H+2OH=2H2O
+ 2- 2+ - + -
2) K2SO4+Ba(Cl)2=2KCl+BaSO4(осадок)
+ 2- 2+ - + -
2K+SO4+Ba+2Cl=2K+2Cl+BaSO4
2+ 2-
Ba+SO4=BaSO4
+ - + - + -
3)KCl+AgNO3=KNO3+AgCl
+ - + - + -
K+Cl+Ag+NO3=K +NO3+AgCl
+ -
Ag+Cl=AgCl
Объяснение:
1) 2KCI+Pb(NO₃)₂=PbCI₂↓+2KNO₃
2K⁺+2CI⁻+Pb²⁺+2NO₃⁻=PbCI₂↓+2K⁺+2NO₃ ⁻
2CI⁻+Pb²⁺=PbCI₂↓
2) Fe(OH)₃+3HNO₃=Fe(NO₃)₃+3H₂O
Fe(OH)₃+3H⁺+3NO₃⁻=Fe³⁺+3NO₃⁻+3H₂O
Fe(OH)₃+3H⁺=Fe³⁺+3H₂O
3) Na₂SO₃+2HCI=2NaCI+SO₂↑+H₂O
2Na⁺+SO₃²⁻+2H⁺+2CI⁻=2Na⁺+2CI⁻+SO₂↑+H₂O
SO₃²⁻+2H⁺=SO₂↑+H₂O
4) Fe₂O₃+3H₂SO₄=Fe₂(SO₄)₃+3H₂O
Fe₂O₃+6H⁺+3SO₄²⁻=2Fe³⁺+3SO₄²⁻+3H₂O
Fe₂O₃+6H⁺=2Fe³⁺+3H₂O
5) ZnS+K₂SO₄≠