硫酸厂在生产过程中会产生废气SO 2 ,工业生产中处理SO 2 的方法很多,例如可以把废气通入烧碱溶液或石灰

2025-04-06 18:04:13
推荐回答(1个)
回答(1):

(1)设反应掉64kg的二氧化硫需Ca(OH) 2 和NaOH的质量分别为x、y,
Ca(OH) 2 +SO 2 ═CaSO 3 +H 2 O
 74       64
  x       64kg
 
74
x
=
64
64kg
,解得x=74kg,
则需要的钱数为74千克×0.8元/千克=59.2元,
2NaOH++SO 2 ═Na 2 SO 3 +H 2 O
 80     64
  y     64kg
80
y
=
64
64kg
,解得y=80kg,
则需要的钱数为80千克×1.8元/千克=144元,
144元>59.2元,故选用Ca(OH) 2 更加经济,故答案为:熟石灰;
(2)设每天排放的二氧化硫为128千克所需要的熟石灰的质量为z,
则Ca(OH) 2 +SO 2 ═CaSO 3 +H 2 O
 74       64
  x       128kg
74
z
=
64
128kg
,解得z=148kg,
则一个月应投入的资金为148千克×0.8元/千克×30=3552元,
答:用最经济的方法处理这些尾气,理论上该工厂一个月应投入3552元资金.

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