求解答过程：某学生为测定未知浓度
\u5316\u5b66\u4e2d\u548c\u6ef4\u5b9a\u7684\u8ba1\u7b97 22\uff0812\u5206\uff09\u67d0\u5b66\u751f\u4e3a\u6d4b\u5b9a\u672a\u77e5\u6d53\u5ea6\u7684\u786b\u9178\u6eb6\u6db2\uff0c\u5b9e\u9a8c\u5982\u4e0b\u4e2d\u548c\u6ef4\u5b9a H+=OH-
n\uff08OH-\uff09=0.14*0.015=0.0021
n(H2SO4)=0.0021/2=0.00105
\u5f85\u6d4b\u6eb6\u6db2\u4e2d\u6240\u6709\u7684H2SO4 = 0.00105 *4 =0.0042 MOL
\u2234 c(H2SO4)=0.0042/0.001=4.20mol/L
\u4f7f\u7528\u84b8\u998f\u6c34\uff0c\u7a00\u91ca\u6d53\u786b\u9178\uff0c10\u500d\u621650\u500d\uff0c\u4f60\u4f30\u8ba1\u4e00\u4e0b\u6d53\u786b\u9178\u7684\u6d53\u5ea6\uff0c\u7136\u540e\u5bf9\u7a00\u91ca\u540e\u7684\u7a00\u786b\u9178\u9178\u78b1\u6ef4\u5b9a~
| (1)①ECDBAGF；②酚酞；③滴入最后一滴NaOH溶液，溶液突然变成红色，半分钟不褪色 (2)偏大；滴定管内壁上的水膜，将标准液稀释，使体积读数偏大 (3)4.20 |
绛旓細鍥炵瓟锛(1)鈶燛CDBAGF;鈶￠厷閰;鈶㈡淮鍏ユ渶鍚庝竴婊碞aOH婧舵恫,婧舵恫绐佺劧鍙樻垚绾㈣壊,鍗婂垎閽熶笉瑜壊 (2)鍋忓ぇ;婊村畾绠″唴澹佷笂鐨勬按鑶,灏嗘爣鍑嗘恫绋閲,浣夸綋绉鏁板亸澶 (3)4.20
绛旓細锛1锛夋爣鍑嗘恫鐨勬祿搴︿负0.14mol?L-1锛岄夋嫨婧舵恫鐨勬祿搴︿笌鏍囧噯娑茬殑娴撳害鎺ヨ繎锛屽鏈1mol/L鍜0.1mol/L鐨凬aOH婧舵恫锛屽簲閫夌敤0.1mol/L鐨凬aOH婧舵恫锛屼互鍑忓皯瀹為獙璇樊锛涙晠绛旀涓猴細0.1mol?L-1锛涢夋嫨婧舵恫鐨勬祿搴︿笌鏍囧噯娑茬殑娴撳害鎺ヨ繎锛屼互鍑忓皯瀹為獙璇樊锛涳紙2锛夌敱鍥惧彲鐭ョ敳涓洪吀寮忔淮瀹氱锛屼箼涓虹⒈寮忔淮瀹氱锛孨aOH婧舵恫搴旂敤...
绛旓細寰呮祴婧舵恫涓墍鏈夌殑H2SO4 = 0.00105 *4 =0.0042 MOL 鈭 c(H2SO4)=0.0042/0.001=4.20mol/L
绛旓細鏁绛旀涓猴細閰稿紡婊村畾绠★紱鏈鍚庝竴婊碞aOH婧舵恫鍔犲叆鏃讹紝婧舵恫棰滆壊鎭板ソ鐢辨棤鑹插彉涓猴紙娴咃級绾㈣壊锛屼笖鍗婂垎閽熷唴涓嶈お鑹诧紱锛3锛夋牴鎹甤锛堥吀锛壝梀锛堥吀锛=c锛堢⒈锛壝梀锛堢⒈锛夛紝闇瑕乂锛圢aOH锛= 20.02+20.00+19.98 3 mL=20mL锛屽疄楠3璇樊杈冨ぇ锛屽彲鑸嶅純锛屽垯璇ョ洂閰哥殑娴撳害涓 20mL脳0.10mol/L 20mL ...
绛旓細鍒欒鐩愰吀鐨勬祿搴︿负22.71脳10?3L脳0.1000mol/L20.00脳10?3L=0.1136mol/L锛屾晠绛旀涓猴細0.1136mol/L锛涒憿纰卞紡婊村畾绠＄殑姘旀场閫氬父姗＄毊绠″唴锛屽彧瑕佸皢婊村畾鐜荤拑澶存湞涓婏紝骞舵尋姗＄毊绠′腑鐨勭幓鐠冪彔灏卞彲浠ュ皢姘旀场鍐叉帓鍑猴紝鏁呯瓟妗堜负锛氫笝锛涒懀鏍规嵁c锛堝緟娴嬶級=c(鏍囧噯)脳V(鏍囧噯)V(寰呮祴)鍒嗘瀽璇樊锛孉锛庢淮瀹氱粓鐐硅鏁版椂...
绛旓細鏁绛旀涓猴細100mL瀹归噺鐡躲佺儳鏉紱锛4锛夊埄鐢ㄩ吀寮忔淮瀹氱閲忓彇20.00mL寰呮祴绋鐩愰吀婧舵恫鏀惧叆閿ュ舰鐡朵腑锛屽洜閰搁亣閰氶厼涓嶅彉鑹诧紝纰遍亣閰氶厼鍙樼孩锛屽垯婊村畾缁堢偣鐨勬爣蹇椾负鏈鍚庝竴婊碞aOH婧舵恫鍔犲叆锛屾憾娑茬敱鏃犺壊鎭板ソ鍙樻垚娴呯孩鑹诧紝鍗婂垎閽熷唴涓嶈お鑹诧紝鐢眂锛堢⒈锛=c(閰)V(閰)V(纰)鍙煡锛屽洜绗竴娆℃暟鎹樊鍒緝澶э紝鍒橵锛圢aOH锛=23....
绛旓細锛堝叡12鍒嗭級锛1锛0.1mol/L 锛2锛夛紴 锛3锛夌儳鏉100mL瀹归噺鐡讹紙绛斿涓涓緱1鍒嗭級锛4锛夐吀寮忔淮瀹氱 0.12 mol路L 鈥1 鏈鍚庝竴婊存阿姘у寲閽犳憾娑插姞鍏ワ紝婧舵恫鐢辨棤鑹叉伆濂藉彉鎴愭祬绾㈣壊锛屽崐鍒嗛挓鍐呬笉瑜壊 鐣
绛旓細鍥犱负閰氶厼鍙湁鍦╬H涓8.2锝10涔嬮棿鎵嶄細鍙樼孩锛屽綋婧舵恫杩樻槸鏃犺壊鐨勬椂鍊欒鏄嶱H涓洪吀鎬х殑鍙兘鎬уぇ锛屽洜姝ら渶瑕佸皢姘㈡哀鍖栭挔婧舵恫鍐嶆淮鍏ヤ竴婊存潵纭婊村畾缁堢偣銆備絾鏄夋嫨閰氶厼鍋氭寚绀哄墏璇樊鏈夌偣澶э紝濡傝姹備弗鏍兼椂鍙夋嫨鍏朵粬鍋氭寚绀哄墏
绛旓細锛1锛夌敤宸茬煡鐗╄川鐨勯噺娴撳害鐨勬爣鍑嗙⒈娑叉鼎娲2鍒3娆 锛2锛夋渶鍚庝竴婊存阿姘у寲閽犳憾娑插姞鍏ワ紝婧舵恫鐢辨棤鑹叉伆濂藉彉鎴愭祬绾㈣壊锛屼笖鍗婂垎閽熷唴涓嶈お鑹诧紙3锛0.11mol/L 锛4锛変笝锛5锛堿CDF
绛旓細鍐嶆帓姘旀场锛涙晠閫夛細涓欙紱锛3锛変笁娆℃淮瀹氭秷鑰楃殑浣撶Н涓猴細24.98mL锛25.02mL锛26.32锛岀涓夌粍鏁版嵁鏃犳晥锛屽垯骞冲潎娑堣梀锛圢aOH锛=25.00mL锛宑锛堝緟娴嬶級=V(鏍囧噯)脳c(鏍囧噯) V(寰呮祴)=0.2000mol?L ?1脳25.00mL20.00mL鈺0.25 mol/L锛涙晠绛旀涓猴細0.25 mol/L锛涳紙4锛堿锛庡疄楠岀粨鏉熸椂锛...
