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-]
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-]
举一反三
- 下列磷的含氧酸中是（）亚磷酸。 A: H<sub>3</sub>PO<sub>2</sub> B: H<sub>3</sub>PO<sub>3</sub> C: H<sub>3</sub>PO<sub>4</sub> D: H<sub>3</sub>PO<sub>5</sub>
- 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-]
- 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-]
- 制造化肥〝普钙〞的主要原料是：（） A: CaCO<sub>3</sub>+H<sub>3</sub>PO<sub>4</sub> B: Ca<sub>5</sub>F（PO<sub>4</sub>）<sub>3</sub>+H<sub>2</sub>SO<sub>4</sub> C: CaF<sub>2</sub>+H<sub>3</sub>PO<sub>4</sub> D: CaSO<sub>4</sub>+H<sub>3</sub>PO<sub>4</sub>
- 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-]