Question

Answer 1

a) Gọi CTPT là Na_xS_yO_z

x:y:z=\(\dfrac{36,51}{23}:\dfrac{25,39}{32}:\dfrac{38,1}{16}\) = 1,59 : 0,79 : 2,38 = 2 : 1 : 3

=> Na₂SO₃

b) Gọi CTPT là Na_xS_yO_z

x:y:z=\(\dfrac{29,11}{23}:\dfrac{40,51}{32}:\dfrac{30,38}{16}\) = 1,26 : 1,26 : 1,9 = 2 : 2 : 3

=> Na₂S₂O3

 

Answer 2

a) Gọi CT cần tìm là NaxSyOz

\(x:y:z=\dfrac{36,51}{23}:\dfrac{25,39}{32}:\dfrac{38,1}{16}=1,6:0,8:2,4=2:1:3\)

=> CTHH cần tìm là Na2SO3

b) Gọi CT cần tìm là NaxSyOz

\(x:y:z=\dfrac{29,11}{23}:\dfrac{40,51}{32}:\dfrac{30,38}{16}=1,27:1,27:1,9=1:1:1,5=2:2:3\)

=> CTHH cần tìm là Na2S2O3

c ) Gọi CT cần tìm là KxCryOz

\(x:y:z=\dfrac{26,53}{39}:\dfrac{35,37}{52}:\dfrac{38,1}{16}=0,68:0,68:2,38=1:1:3,5=2:2:7\)

=> CTHH cần tìm là K2Cr2O7

c ) Gọi CT cần tìm là KxClyOz

\(x:y:z=\dfrac{28,16}{39}:\dfrac{25,63}{35,5}:\dfrac{46,21}{16}=0,72:0,72:2,89=1:1:4\)

=> CTHH cần tìm là KClO4

Answer 3

c) Gọi CTPT là K_xCr_yOz

x:y:z=\(\dfrac{26,53}{39}:\dfrac{35,37}{52}:\dfrac{38,1}{16}\) = 0,68 : 0,68 : 2,38 = 2:2:7

=> K₂Cr₂O₇

d) Gọi CTPT là K_xCl_yOz

x:y:z=\(\dfrac{28,16}{39}:\dfrac{25,63}{35,5}:\dfrac{46,21}{16}\) = 0,72 : 0,72 : 2,89 = 1:1:4

=> KClO₄