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总碱度的测定1.实验步骤:电极,电极校正曲线的斜率2.数据处理:表格,图(名称、美观),有效数字,总碱度。如何根据微分曲线确定等当点!滴定体积VpH值∆pH/∆V09.690.489.610.171.559.420.182.559.180.243.48.860.383.78.690.573.898.550.743.958.491.004.088.351.084.118.31.674.38.140.845.557.550.478.37.020.199.16.910.1410.736.730.1112.116.570.1215.155.990.1916.25.570.4016.884.960.9017.14.641.4517.154.551.8017.24.481.4017.224.44.0017.434.091.4817.713.870.7917.893.750.6717.923.730.67183.70.3818.333.550.4518.833.40.3019.43.280.2120.113.150.1820.63.080.1420.983.040.1121.213.010.1321.330.1123456789101105101520pH消耗HCl的体积/mL0.000.501.001.502.002.503.003.504.004.505.0005101520消耗HCl的体积/mL3,讨论][][332HCOHCOH2232COOHCOHpH小于6,出现滴加盐酸后pH下降,后又回升,多次反复4,思考题大气CO2(390ppm)纯水(H2O)CO225℃下水和大气达到平衡时,水中CO2的浓度为:[H2CO3]=1.5×10-5molL-1,pH=5.60。1L和大气平衡的水中含CO2的量:15umol1.3249克Na2CO3为12500umol•用和大气平衡的含二氧化碳的水:pH=4.489•用无二氧化碳的水:pH=4.48922323COOHCOHHCOH水体吸收二氧化碳对碱度值是否有影响?OHCOOHCO22322322322HCOOHCOCO对碳酸盐、重碳酸盐碱度有影响,对总碱度无影响!(2)盛放pH=10的缓冲溶液时,一定要用塑料烧杯吗?(3)使用标准缓冲溶液校正pH计时,应注意什么?OHSiOSiOOH22322电极内充液检查,拔下橡胶塞,斜率
本文标题:碱度测定实验报告
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