所以:pH=1/2(pKa+pc)=1/2(3.37+1.00)=2.185=2.18 首先你要知道计算PH其实是计算H+的浓度,带入 -lg[H+]之后算出值、其次你知道这玩意儿 CH3NH3CL是会水解的、他会吸收氢氧根从而有些许H+被电离、但是你要告诉我这玩意儿 CH3NH3CL的水解值啊、要不怎么算啊~既然没有就告你思路得了~...
Using the given pKa values, rank the following species in order from strongest base to weakest base: CH3N+H3: 10.7 CH3NH2: 40 CH3O+H2: -2.5 CH3OH: 15.5 CH3COOH: 4.76Which is the strongest acid? Why? A. H_2O. B. CH_3CH_2OH. C. CH_3CO...
加入醋酸60mL时,溶液中的溶质为NaOOCCH3、NH4OOCCH3、CH3COOH,且三者的物质的量浓度相等,该溶液为缓冲溶液,溶液的pH=pKa−lgn(酸)n(盐)=−lg1.8×10−5−lg0.0020.002×2=6−lg9=6−2lg3≈5,故C正确;D.酸或碱抑制水电离、含有弱离子的盐促进水电离,A点溶液中溶质为NaOOCCH3、NH3⋅H2O,B...
pKa越大,酸性越弱 通过一些反应也可以检验,我写乙炔了 NaNH2+HC三CH→NH3+HC三CNa HC三CNa+H2O→HC三CH+NaOH (这两个反应平衡常数都相当大)甲基钠碱性太强,不写了