a) \(K^I_x\left(SO_4\right)_y^{II}\)
Theo quy tắc hóa trị: x.I = y.II
=> \(\dfrac{x}{y}=\dfrac{II}{I}=\dfrac{2}{1}\)
=> CTHH: K2SO4
b) \(Al^{III}_x\left(NO_3\right)_y^I\)
Theo quy tắc hóa trị: x.III = y.I
=> \(\dfrac{x}{y}=\dfrac{I}{III}=\dfrac{1}{3}\)
=> CTHH: Al(NO3)3
c) \(Fe^{III}_x\left(OH\right)_y^I\)
Theo quy tắc hóa trị: x.III = y.I
=> \(\dfrac{x}{y}=\dfrac{I}{III}=\dfrac{1}{3}\)
=> CTHH: Fe(OH)3
d) \(Ba^{II}_x\left(PO_4\right)_y^{III}\)
Theo quy tắc hóa trị: x.II = y.III
=> \(\dfrac{x}{y}=\dfrac{III}{II}=\dfrac{3}{2}\)
=> CTH: Ba3(PO4)2
\(a,CTTQ:K_x^{I}(SO_4)_y^{II}\\ \Rightarrow x.I=y.II\Rightarrow \dfrac{x}{y}=2\Rightarrow x=2;y=1\\ \Rightarrow K_2SO_4\\ b,CTTQ:Al_x^{III}(NO_3)_y^{I}\\ \Rightarrow x.III=y.I\Rightarrow \dfrac{x}{y}=\dfrac{1}{3}\Rightarrow x=1;y=3\\ \Rightarrow Al(NO_3)_3\\ c,CTTQ:Fe_x^{III}(OH)_y^I\\ \Rightarrow x.III=y.I\Rightarrow \dfrac{x}{y}=\dfrac{1}{3}\Rightarrow x=1;y=3\\ \Rightarrow Fe(OH)_3\\ \)
\(d,CTTQ:Ba_x^{II}(PO_4)_y^{III}\\ \Rightarrow x.II=y.III\Rightarrow \dfrac{x}{y}=\dfrac{3}{2}\Rightarrow x=3;y=2\\ \Rightarrow Ba_3(PO_4)_2\)
a) K2SO4
b)Al(NO3)3
c)Fe(OH)3
d)Ba3(PO4)2