Calculate the complete and net ionic equations, spectators and precipitates in H3PO4(aq) + 3NaOH(aq) = Na3PO4(aq) + 3H2O(l)
Balance NaOH + H3PO4 + H2O = Na2HPO4*12H2O Using the Algebraic Method To balance the equation NaOH + H3PO4 + H2O = Na2HPO4*12H2O using the algebraic method step-by-step, you must have experience solving systems of linear equations. The most common methods are substitution/...
答(1) 在H3PO4溶液中存在下列质子转移平衡:H3PO4 (aq) + H2O(l) (aq) + H3O+(aq) (aq) + H2O(l) (aq) + H3O+(aq) (aq) + H2O(l) (aq) + H3O+(aq)H2O(l) + H2O(l) H3O+(aq) + OH-(aq)[]=Ka2Ka3=[OH-]=由于Ka1>>Ka2>>Ka3,各离子浓度由大到小为:[H3O+]≈[]>[]...
添加 2.0×10−3 mol 的 NaOH 后,计算该溶液中的 [H+]。(4)计算在浓度为 0.20 M 的 Na3PO4 溶液中 [H+]。 2磷酸H3PO4 电离方程式如下H3PO4(aq)⇌H+(aq)+H2PO−4(aq) K1=7.1×10−3H2PO−4(aq)⇌H+(aq)+HPO2−4(aq) K1=6.2×10−8HPO2−4(aq)⇌H+(aq)...
解(1) n(H3PO4):n(NaOH)=(100 mL×0、10 mol·L-1):(100 mL×0、20 mol·L-1)=1:2,反应为:H3PO4(aq) + 2NaOH(aq) = Na2HPO4(aq) + 2H2O(l)生成[Na2HPO4]= 0、10 mol·L-1×100 mL/(100 mL+100 mL)=0、050 mol·L-1pH=1-|||-2(pKa2+pKa3) =1-|||-2(7、21...
NaOH , Na^+ C. HS^- ,D. H_2O , OH^- 2下列溶液不能组成共轭酸碱对的是( )A.HAc-NaAcB.C.D.E. 3下列溶液中不能组成缓冲溶液的是( )A.和B.和C.氨水和过量的HClD.HCl和过量的氨水 46.常温下,溶液中 KH_2PO_4 的电离程度大于其水解程度,则下列有关 KH_2PO_4 溶液中粒子的...
解(1) n(H3PO4):n(NaOH)=(100 mL×0.10 mol·L1、):(100 mL×0.20 mol·L1、)=1:2,反应为:H3PO4(aq) + 2NaOH(aq) = Na2HPO4(aq) + 2H2O(l)生成[Na2HPO4]= 0.10 mol·L1、×100 mL/(100 mL+100 mL)=0.050 mol·L1、pH=1-|||-2(pKa2+pKa3) =1-|||-2(7.21+12.32)= 9.76(...
【题目】磷酸H3PO4电离方程式如下K_1=7.1*1 0-3H_2PO_(-4)(aq)⇌H^+(aq)+HPO_2-4^((aq)) K_1=6.2* 10-8HPO_2-4^((aq))≠H^+(aq)+PO_(3-4)(aq)K_3=4.5*1 0-13式中 :(aq)= (水溶液)(1)写出H3PO4电离的对方程式进行配平,求出浓度为1.5M的H3PO4溶液的pH值。(2)要...
C根据题意,A,B,C 点分别发生如下反应而恰好生成对应的钠盐:A 点:NaOH + H3PO4=NaH2PO4+H2OB 点:2NaOH + H3PO4=Na2HPO4+2H2OC 点: 3NaOH + H3PO4=Na3PO4+3H2O因此 A,B,C 点对应的溶液实际上分别为 NaH2PO4(aq),Na2HPO4(aq) 和 Na3PO4(aq)。A.H3PO4 的第一步滴定的终点为 A ...
NaClO + NaOH = ClHO + Na2O Recently Balanced EquationsBalance NaHCO3 + H3PO4 = CO2 + H2O + NaH2PO4 Using the Algebraic Method To balance the equation NaHCO3 + H3PO4 = CO2 + H2O + NaH2PO4 using the algebraic method step-by-step, you must have experience solving systems...