1.000mol/L草酸标准溶液;0.1mol/LNaOH标准溶液(浓度待标定);H2SO4,H3PO4混合酸标准试液(两种酸浓度之和低于0.5mol/L) 4实验步骤 1.开启酸度计预热半小时,连接电极及滴定装置。摘去饱和甘汞电极的橡皮帽,并检查内电极是否浸入饱和KCl溶液中,如未浸入,应补充饱和KCl溶液。安装玻璃电极和饱和甘汞电极,并使饱和甘...
H3PO4(0.7 M in THF), acetonitrile, water (25 and 100 °C) and aqueous HCl (12 M) and NaOH (14 M) solutions for 7 days and observed that TPB-DMeTP-COF is stable to retain its crystallinity (Supplementary Fig.4a) and porosity (Supplementary Figs.4b,4c,5and6, Supplementar...
That's still hardly an attempt at solving the problem.What do you know about titration curves? Do they have some specific points, other than the equivalence?Have you tried to plot the curve? Calculate the acid concentration? Logged ChemBuddy chemical calculators - stoichiometry, pH, concentratio...
However, I was told by my instructor that this is incorrect, that the moles of acidic protons must be calculated. And while I have tried to figure this out, I keep getting stuck. So the way I understand it is, Phosphoric Acid dissociates this way: at low pH, phosphoric acid is comple...
e iodine number was estimated by mixing the activated carbon with 0.02 N iodine solution shaken occasionally and then by titration of the solution against Na2S2O3, 5H2O. 2.6. blue Methylene Blue was considered Adsorption as probe mCoalpeacucilteiesf,or 3a.ssMesseitnhgyletnhee adsorption capacity ...
1.000mol/L草酸标准溶液;0.1mol/LNaOH标准溶液(浓度待标定);H2SO4,H3PO4混合酸标准试液(两种酸浓度之和低于0.5mol/L) 4实验步骤 1.开启酸度计预热半小时,连接电极及滴定装置。摘去饱和甘汞电极的橡皮帽,并检查内电极是否浸入饱和KCl溶液中,如未浸入,应补充饱和KCl溶液。安装玻璃电极和饱和甘汞电极,并使饱和甘...
2001501005005010015001234567系列1由以上曲线知vep约在600ml左右由内插法求vepvep6008861060088163604ml因为草酸与naoh的反应h2c2o42oh2h2oc2o42所以naoh浓度为cnaoh1522060400828moll152混合酸的测定粗测vmlph051023815258202892542230716351007401127223229细测vmlphphv
Ag，AgCl|HCl(0.1mol/L)|玻璃膜| H2SO4,H3PO4（试液）‖KCl(饱和)|Hg2Cl2,Hg 在滴定过程中，通过测量工作电池的电动势，了解溶液pH值随加入标准碱溶液体积V的变化情况，然后由pH-V曲线或（ΔpH/ΔV）-V曲线求得终点时耗去NaOH标准溶液的体积，也可用二级微商法求出Δ2pH/ΔV2 =0时，相应的NaOH标准...
of the concentration of H3PO4and the carbonization temperature on the activated carbon’s properties were studied. Several physicochemical methods, including Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), X-ray diffraction, methylene blue index, Boehm titration, ...
The 0.10 ± 0.01 M NaOH solution (Vekton, Russia) was used to adjust the pH of NaxH(3−x)PO4 solutions to 4.5 ± 0.1, 6.6 ± 0.1 and 9.9 ±0.2. Table 1 summarizes the composition of the studied NaxH(3−x)PO4 solutions. This composition was calculated using the equilibrium ...