鐩搁棞(gu膩n)鎺ㄨ枽锛�娉ㄥ唺绲�(ji茅)妲�(g貌u)宸ョ▼甯│椤岃紨灏�(d菐o)锛氭憾娑叉ā鎿绯诲垪鍖附

渚嬶細

1.鍦�200mL鐨勬憾娑蹭腑鍚硸25.0g锛屾憾娑茬殑瀵嗗害鐐�1.047g/mL3銆傝┎婧舵恫鐨勮唱(zh矛)閲忕櫨鍒嗘瘮婵冨害鐐�( )銆�

A.10.0%;B.11.0%

C.11.9%;D.12.0%

绛旀锛欳

瑙ｇ瓟濡備笅锛�

2.宸茬煡10%楣介吀婧舵恫鐨勫瘑搴�1.47g/cm3锛孒Cl鐨勬懇鐖捐唱(zh矛)閲忕偤36.5g/mol锛岃┎婧舵恫鐨勯珨绌嶆懇鐖炬績搴︽槸( )銆�

A.2.87mol/dm3;B.2.50mol/dm3

C.3.10mol/dm3;D.2.60mol/dm3

绛旀锛欰

瑙ｇ瓟濡備笅锛�

3.鍦ㄥ悓姝ラ檷婧亷绋嬩腑锛屼笅杩版憾娑蹭腑鏈€鍏堢祼(ji茅)鍐扮殑鏄�(銆€)銆�

A.婵冨害鐐�0.01mol/L鐨凬aAc婧舵恫

B.婵冨害鐐�0.01mol/L鐨凥Ac婧舵恫

C.婵冨害鐐�0.01mol/L鐨勮敆绯栨憾娑�

D.婵冨害鐐�0.01mol/L鐨凪gCl2婧舵恫

绛旀锛欳

瑙ｇ瓟濡備笅锛氬洜A銆丅銆丏闋呭潎鐐洪浕瑙ｅ害婧舵恫锛屾憾娑蹭腑寰矑鏁�(sh霉)婵冨害鍧囧ぇ浜嶤闋�锛屽張∆Tfp=Kfp×m锛屾墍浠�∆Tfp鑸噈鎴愭姣�銆�

4.宸茬煡HAc鐨凨a=1.8×10-5锛�0.50mo1鈭昫m3HAc鐨勯浕闆㈠害鏄�(銆€)銆�

A.0.30%;B.1.30%;C.0.60%;D.0.90%

绛旀锛欳

瑙ｇ瓟濡備笅锛�

5.鍦℉2S姘存憾娑蹭腑鍔犲叆涓€浜汵a2S鍥洪珨,灏囦娇( )銆�

A.婧舵恫pH鍊兼笡灏�;B.婧舵恫pH鍊煎澶�

C.H2S骞宠　甯告暩(sh霉)鍊兼笡灏�;D.H2S闆婚洟搴﹀澶�

绛旀锛欱

瑙ｇ瓟濡備笅锛�

H2S姘存憾娑蹭腑锛孒2S 2H++S2-

鍔犲叆鍥洪珨Na2S鍚庯紝[S2-]涓婂崌锛屾墍浠ュ钩琛″乏绉�锛孾H+]涓嬮檷锛宲H澧炲ぇ锛�

6.鏌愭憾娑茬殑pH鍊肩偤5.5,鍓囧叾H+鐨勬績搴︾偤( )銆�

A.3.0×10-6mol/L;B.3.5×10-6mol/L

C.5.5×10-5mol/L;D.5.5×10-7mol/L

绛旀锛欰

瑙ｇ瓟濡備笅锛� pH=-lg[H+]锛屾墍浠H+]=10-5.5=3.0×10-6

7.灏噋H=2鍜宲H=1l鐨勫挤閰稿拰寮峰牽婧舵恫绛夐噺娣峰拰锛屾墍寰楁憾娑茬殑pH鍊肩偤( )銆�

A.1.35;B.3.35;C.2.35;D.6.50

绛旀锛欳

瑙ｇ瓟濡備笅锛�

瑷�(sh猫)寮烽吀鍜屽挤鍫跨殑楂旂⿳鍧囩偤1L锛屽墖锛� nH+=0.0lmol锛宯OH-=0.001mol

閬庡墿鐨凥+鐐猴細nH+=0.009mol锛�

娣峰悎鍚庣殑婧舵恫涓璈+鐨勬績搴︾偤锛�0.009鈭�2=0.0045mol鈭昄

鎵€浠�锛宲H=-lg(0.0045)=3-lg4.5=2.35

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