2009-9-23 17:42
qwert123
摩爾體積
11-13題怎樣做?Thank you very much!
[img=631,495]http://3up.cc/pic/1253698858-3524382303.jpg[/img]
[img=631,533]http://3up.cc/pic/1253698879-3524382303.jpg[/img]
[[i] 本帖最後由 qwert123 於 2009-9-23 17:44 編輯 [/i]]
2009-10-6 23:38
YY..
很耐沒來..
11a) 0.7488g/(400/1000) = 1.872g dm^-3
11b)0.7488g/44 g mol^-1 = 0.017mol
(400/1000)/x = 0.017mol
0.4 = 0.017x
x = 23.5 dm^3 mol^-1
11c) 要用返11b個答案,
(200/1000)/23.5 = mol = 0.0085106
0.5448/x = 0.0085106
0.5448 = 0.0085106x
x = 64.0 g mol^-1
12a)每小時被電解的鹽有 250*(10)g - 86(10)g = 1640g
因摩爾比例2:2
NaCl的摩爾數1640g/(23+35.5) = 28.0mol
生成的NaOH = 28.0mol x( 23+16+1 ) g mol^-1 = 1120g
12b)每小時被電解的鹽有 250*(10)g - 86(10)g = 1640g
摩爾比例2:1
NaCl的摩爾數 = 1640g/(23+35.5) = 28.0mol
生成的Cl2摩爾數= 28.0mol x 0.5 = 14mol
Cl2體積 = 14mol x 24dm^3 mol^-1 = 336 dm^3
13a) 2CuS + 3O2 → 2CuO + 2SO2
13b) CuS 摩爾數 = 1910/(63.5 + 32) = 20mol
摩爾比例相同 2:2
生成的CuO = 20 mol x (63.5 + 16) = 1590g
生成的SO2 都係20mol 因為比例又係2:2
所以SO2氣體體積 = 20mol x 24 dm^3 mol^-1
= 480 dm^3