高一化学书上的习题
\u9ad8\u4e00\u5316\u5b66 \u4e66\u4e0a\u7684\u4e00\u9053\u9898 \u5e2e\u5e2e\u5fd9 \u8c22~NaHCO3=Na2CO3+CO2+H2O \u25b3m
2*84----------------------44+18=62
-m(NaHCO3)-----------------------m2-m1
\u6bd4\u4e00\u4e0b\u5c31\u5f97\u53cd\u5e94\u7684NaHCO3\u8d28\u91cf,\u7136\u540e\u7528\u539f\u8d28\u91cf\u4e00\u51cf\u5c31OK\u4e86
\u540c\u7406\u5f97m(Na2CO3),
\u5f53\u5269\u4f59\u56fa\u4f53\u5168\u90e8\u4e3aNa2CO3\u65f6,\u53ef\u4ee5\u65ad\u5b9aNaHCO\u2462\u5df2\u7ecf\u5b8c\u5168\u5206\u89e3,\u8fd9\u4e2a\u5f88\u7b80\u5355\u62c9,\u81ea\u5df1\u7b97\u4e0b\u5427
\u540c\u5206\u5f02\u6784\u4f53\u662f\u4e00\u79cd\u6709\u76f8\u540c\u5316\u5b66\u5f0f\uff0c\u6709\u540c\u6837\u7684\u5316\u5b66\u952e\u800c\u6709\u4e0d\u540c\u7684\u539f\u5b50\u6392\u5217\u3002
\u540c\u7d20\u5f02\u5f62\u4f53\u662f\u76f8\u540c\u5143\u7d20\u6784\u6210,\u4e0d\u540c\u5f62\u6001\u7684\u5355\u8d28\u3002
\u6240\u4ee5D\u6b63\u786e
168 106 18+44 18+44=62(逃逸质量)
X 0.73 3.24-2.51=0.73
168*0.73=62*X
X=1.978克
NaHCO3占61%
Na2CO3占39%
麟
减小的质量是二氧化碳和水的质量:
3.24g-2051g=0.73g
2NaHCO3====Na2CO3+H2O+CO2质量减小
168-----------------------62
x-------------------------0.73
x=1.98
原混合物中碳酸钠的质量:3.24g-1.98g=1.26g
所以,Na2CO3%=1.26g/3.24g=38.9%
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