有一未知浓度的稀盐酸,如何测定百分比浓度? 如何测定未知浓度的HCL
\u5982\u4f55\u6d4b\u5b9a\u672a\u77e5\u6d53\u5ea6\u76d0\u9178\u7684\u6d53\u5ea6\uff1f\u6700\u7b80\u5355\u7684\u65b9\u6cd5\u662f\u7528\u9178\u78b1\u6ef4\u5b9a\u7684\u65b9\u6cd5\u6765\u6d4b\u5b9a\uff0c\u53d6\u4e00\u5b9a\u91cf\u4f53\u79ef\u7684\u76d0\u9178\uff0c\u5148\u5411\u76d0\u9178\u4e2d\u6ef4\u4e24\u6ef4\u65e0\u8272\u915a\u915e\uff0c\u5728\u9010\u6ef4\u6ef4\u5165\u5df2\u77e5\u6d53\u5ea6\u7684\u6c22\u6c27\u5316\u94a0\u6eb6\u6db2\uff0c\u5f53\u6eb6\u6db2\u7531\u65e0\u8272\u6070\u597d\u53d8\u4e3a\u7ea2\u8272\u65f6\uff0c\u8bc1\u660e\u76d0\u9178\u4e0e\u6c22\u6c27\u5316\u94a0\u5b8c\u5168\u53cd\u5e94\uff0c\u901a\u8fc7\u8bfb\u53d6\u7684\u6ef4\u5165\u7684\u5df2\u77e5\u6d53\u5ea6\u7684\u6c22\u6c27\u5316\u94a0\u7684\u91cf\uff0c\u5df2\u77e5\u5316\u5b66\u53cd\u5e94\u65b9\u7a0b\u5f0fNaOH+HCl==NaCl+H2O\u6765\u8ba1\u7b97\u53cd\u5e94\u7684HCl\u7684\u8d28\u91cf\uff0c\u518d\u9664\u4ee5\u53d6\u7528\u7684\u76d0\u9178\u7684\u91cf\u5c31\u53ef\u4ee5\u4e86\uff01
\u79f0\u53d6\u5df2\u5728270-300\u5ea6\u70d8\u7bb1\u5e72\u71e5\u6052\u91cd\uff082g\u7ea63\u5c0f\u65f6\uff09\u7ea61.0000g\u4e8e250ml\u9525\u5f62\u74f6\u4e2d\uff0c\u5bb650ml\u7eaf\u51c0\u6c34\uff0c\u6eb6\u89e3\uff0c\u52a010\u6ef4\u6eb4\u7532\u915a\u7eff-\u7532\u57fa\u7ea2\u6307\u793a\u6db2\uff0c\u7528\u672a\u77e5\u6d53\u5ea6\u76d0\u9178\u6ef4\u5b9a\u81f3\u6eb6\u6db2\u7531\u7eff\u8272\u53d8\u4e3a\u6697\u7ea2\u8272\uff0c\u716e\u6cb8\u4e24\u5206\u949f\uff0c\u51b7\u5374\u540e\u518d\u6ef4\u5b9a\u81f3\u6eb6\u6db2\u518d\u5448\u6697\u7ea2\u8272\uff0c\u540c\u65f6\u4f5c\u7a7a\u767d\u5b9e\u9a8c\u3002
\u8ba1\u7b97\uff1a
C=m*1000/[(V1-V2)*M]
m--\u6240\u7528\u65e0\u6c34\u78b3\u9178\u94a0\u8d28\u91cf
M--\u65e0\u6c34\u78b3\u9178\u94a0\u6469\u5c14\u8d28\u91cf
V1-\u6807\u5b9a\u65e0\u6c34\u78b3\u9178\u94a0\u6240\u7528\u76d0\u9178\u4f53\u79ef
V2-\u6807\u5b9a\u7a7a\u767d\u6eb6\u6db2\u6240\u7528\u76d0\u9178\u4f53\u79ef
\u6307\u793a\u5242\u7684\u914d\u5236
\u6eb4\u7532\u915a\u7eff--\u79f0\u53d60.1g\u6eb4\u7532\u915a\u7eff\u6eb6\u4e8e\u4e59\u9187\uff0895%\uff09\uff0c\u7528\u4e59\u9187\uff0895%\uff09\u5b9a\u5bb9\u81f3100ml
\u7532\u57fa\u7ea2--\u79f0\u53d60.2g\u6eb4\u7532\u915a\u7eff\u6eb6\u4e8e\u4e59\u9187\uff0895%\uff09\uff0c\u7528\u4e59\u9187\uff0895%\uff09\u5b9a\u5bb9\u81f3100ml
\u7532\u57fa\u7ea2-\u6eb4\u7532\u57fa\u7eff\u6307\u793a\u5242--\u53d630ml\u6eb4\u7532\u57fa\u7eff\u6eb6\u6db2\uff0c10ml\u7532\u57fa\u7ea2\u6eb6\u6db2\uff0c\u6df7\u5408\u6447\u5300\u5373\u53ef\u3002
取样品,加入称重记为m1,称取过量锌粒,记为m2,将锌粒加入样品中待反映完全后,记下剩余液体和固体总质量,记为m3,(m1+m2)-m3即产生氢气质量记为m4,设稀盐酸中含有x克的HCl,则样品中HCl的质量为x/73=m4/2,算出x,x/m1即质量分数。
绛旓細鎵浠ユ淮瀹氱粓鐐规槸婧舵恫PH涓8.2锝10锛涙晠绛旀涓猴細鍔犲叆鏈鍚庝竴婊存阿姘у寲閽犳憾娑诧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紱8.2锝10锛 鈶℃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=22.62+22.72+22.80 3 mL=22.71mL锛
绛旓細锛1锛塵=nM=0.25L脳0.1moL/L脳40g/mol=1.0g锛屽疄楠屾椂闇鐢ㄥ埌鐨勭幓鐠冧华鍣ㄩ櫎鐜荤拑妫掋佺儳鏉锛岃繕闇瑕250mL瀹归噺鐡讹紝骞剁敤鑳跺ご婊寸瀹氬锛屾晠绛旀涓猴細1.0锛250mL瀹归噺鐡讹紝鑳跺ご婊寸锛涳紙2锛夐噺鍙20.00mL鐨勭█鐩愰吀闇鐢ㄩ吀寮忔淮瀹氱锛屾淮鍔2锝3婊撮厷閰炴憾娑蹭綔鎸囩ず鍓傦紝鏈鍚庝竴婊碞aOH婧舵恫鍔犲叆鏃讹紝婧舵恫棰滆壊鎭板ソ鐢辨棤...
绛旓細1銆侀噰鐢ㄦ淮绠¤瘯婊村畾娉曪細鐢 1.0 mol/L NaOH 婧舵恫锛屽湪鐧借壊鐐规淮鏉夸笂锛屾淮瀹氭湭鐭ョ殑鐩愰吀锛岄厷閰炰负鎸囩ず鍓傦紝鍒濇鍒ゆ柇鍏舵祿搴﹁寖鍥 锛2銆佸噯纭淮瀹氱洂閰告憾娑诧細绉诲彇0.1000 mol/ LNaOH 婧舵恫 25.00 ml 浜庨敟褰㈢摱涓紝鍔3婊寸敳鍩烘鎸囩ず鍓傦紝鏈夌█閲婂悗鎺ヨ繎 0.1 mol/ L HCL 婧舵恫 婊村畾鑷崇粓鐐癸紝璁$畻鍏跺噯纭祿搴︺
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绛旓細1銆佺敤鍒嗘瀽澶╁钩绉伴噺Na₂CO₃锛5.3鍏嬶紝鍏呭垎婧朵簬钂搁姘村悗锛屽姞姘磋嚦婧舵恫鎬讳綋绉1000mL銆傦紙Na₂CO₃婧舵恫娴撳害0.05mol/L锛夛紱2銆佺敤閲忕瓛閲忓彇鏈煡娴撳害鐨HCl婧舵恫100mL锛3銆佸湪HCl婧舵恫涓姞鍏ラ傞噺鐢插熀姗欎綔涓烘寚绀哄墏锛屾鏃舵贩鍚堟憾娑叉樉绾㈣壊锛4銆佷互绗1姝ラ厤缃殑Na₂CO₃婧舵恫涓烘淮瀹...
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