Na2HPO4的质子条件式是（）
A: [H+]+ [H3PO4]= [HPO42-] + 2 [PO43-] +[OH-]
B: [H+]+ [H3PO4]= [H2PO4-] + [PO43-] +[OH-]
C: 2 [H3PO4] + [H2PO4-]+ [H+]= [PO43-] +[OH-]
D: [H+]+ [H3PO4]= [HPO42-] + 2 [PO43-]
A: [H+]+ [H3PO4]= [HPO42-] + 2 [PO43-] +[OH-]
B: [H+]+ [H3PO4]= [H2PO4-] + [PO43-] +[OH-]
C: 2 [H3PO4] + [H2PO4-]+ [H+]= [PO43-] +[OH-]
D: [H+]+ [H3PO4]= [HPO42-] + 2 [PO43-]
举一反三
- NaOH标准溶液滴定H3PO4至甲基橙终点时的质子条件式是 A: [H+]+[H3PO4]=[OH-]+[HPO42-]+[PO43-] B: [H+]+[H3PO4]=[OH-]+[HPO42-]+2[PO43-] C: [H+]+2[H3PO4]+[H2PO4-]=[OH-]+[PO43-] D: [H+]+[Na+]=[OH-]+[H2PO4-]+2[HPO42-]+3[PO43-]
- Na2HPO4水溶液的质子条件式为 A: [H+]+[H2PO4-]+2´[H3PO4]=[OH- ]+[PO43-] B: [H2PO4-]+2´[H3PO4]=[PO43-] C: [H+]+[H2PO4-]+[H3PO4]=[OH- ]+[PO43-] D: [HPO42-]+[H2PO4-]+2´[H3PO4]=[PO43-]
- Na2HPO4 水 溶 液 的 质 子 条 件 式 是 ： A: [ H+]+2[ H2PO4-]+3[H3PO4]=[PO43-]+[OH-] B: [ H+]+[ H2PO4-]+2[H3PO4]=[PO43-]+[OH-] C: [ H+]+[HPO42-]+2[H2PO4-]=2[ PO43-]+[ OH-] D: [ OH-]+3[ PO43-]= [ H+]+[HPO42-]+2[H2PO4-]
- 下列有关Na2HPO4在水溶液中质子条件的叙述,哪个是正确的?（ ） A: [H2PO4-] + [H3PO4] + [H+] =3 [PO43-]+ [OH-] B: 2[H2PO4-] + 3[H3PO4] + [H+] = [PO43-]+ [OH-] C: 3[H2PO4-] + 2[H3PO4] + [H+] = [PO43-]+ [OH-] D: [H2PO4-] + 2[H3PO4] + [H+] = [PO43-]+ [OH-]
- Na2HPO4水溶液的质子条件式PBE正确的是( ) A: [H+] + [H2PO4- ]+[H3PO4] = [OH-] +[PO43-] B: [H+] + [H2PO4- ]+2[H3PO4] = [OH-] +[PO43-] C: [H+] +2[H3PO4] = [OH-] +[PO43-]+ [H2PO4- ] D: [H+] + [H2PO4- ] = [OH-] +[PO43-]