Hojimurod Toshpulatov
29
32. 12,5 g Na
2
CO
3
∙xH
2
O kristallogidrat HCl
bilan ishlanganda, 8,1 g suv hosil bo’ldi. X
qiymatini toping.
A) 8 B) 7 C) 9 D) 10
33. 10,7 g Na
2
CO
3
∙xH
2
O kristallogidrat HCl
bilan ishlanganda, 6,3 g suv hosil bo’ldi. X
qiymatini toping.
A) 6 B) 7 C) 9 D) 10
34. 13,4 g Na
2
CO
3
∙xH
2
O kristallogidrat HCl
bilan ishlanganda, 9 g suv hosil bo’ldi. X
qiymatini toping.
A) 6 B) 7 C) 9 D) 10
35. Bariy xlorid eritmasiga tegishli miqdorda
Na
2
SO
4
∙8H
2
O kristallogid
ratidan qo’shilganda
93,2 g
cho’kma tushdi va 2 molyalli eritma
hosil bo’ldi. Dastlabki bariy xlorid eritmasining
massa ulushini hisoblang.
A) 26/133 B) 13/121
C) 26/117 D) 52/237
35. Bariy xlorid eritmasiga tegishli miqdorda
Na
2
SO
4
∙10H
2
O
kristallogidratidan qo’shilganda
233 g
cho’kma tushdi va 2,5 molyalli eritma
hosil bo’ldi. Dastlabki bariy xlorid eritmasining
massa ulushini hisoblang.
A) 26/133 B) 13/121
C) 52/117 D) 52/207
36. Bariy xlorid eritmasiga tegishli miqdorda
Na
2
SO
4
∙8H
2
O
kristallogidratidan qo’shilganda
116,5 g
cho’kma tushdi va 2 molyalli eritma
hosil bo’ldi. Dastlabki bariy xlorid eritmasining
massa ulushini hisoblang.
A) 26/133 B) 13/121
C) 52/117 D) 52/207
37. Bariy xlorid eritmasiga tegishli miqdorda
Na
2
SO
4
∙8H
2
O
kristallogidratidan qo’shilganda
46,6 g
cho’kma tushdi va 2 molyalli eritma
hosil bo’ldi. Dastlabki bariy xlorid eritmasining
massa ulushini hisoblang.
A) 26/133 B) 13/121
C) 52/117 D) 52/207
38.
25% li mis (II) sulfat eritmasini bug’latib 50
g mis kuporosi olingan bo’lsa, dastlabki
eritmaning massasini (g) aniqlang.
A) 300 B) 128 C) 160 D) 250
39. 14,2 % li natriy sulfat eritmasini
bug’latib
161 g Glauber tuz
i olingan bo’lsa, dastlabki
eritmaning massasini (g) aniqlang.
A) 300 B) 500 C) 200 D) 400
Do'stlaringiz bilan baham: |