将等浓度、等体积的K[img=7x22]1803dd4c4d3ca27.png[/img]C[img=7x22]1803dd4c5671fa8.png[/img]O[img=7x22]1803dd4c611de59.png[/img]与KHC[img=7x22]1803dd4c6a33487.png[/img]O[img=7x22]1803dd4c7268c7d.png[/img]水溶液混合后,溶液的pH值为( )。
A: p[img=29x26]1803dd4c7b6aa00.png[/img](H[img=7x22]1803dd4c8388dd2.png[/img]C[img=7x22]1803dd4c8c6be03.png[/img]O[img=7x22]1803dd4c951601c.png[/img])
B: p[img=29x26]1803dd4c9f55d1e.png[/img](H[img=7x22]1803dd4c8388dd2.png[/img]C[img=7x22]1803dd4c8c6be03.png[/img]O[img=7x22]1803dd4c951601c.png[/img])
C: [img=9x43]1803dd4cc317bfb.png[/img](p[img=29x26]1803dd4ccc4bd6a.png[/img]+p[img=29x26]1803dd4cd54d421.png[/img])
D: p[img=29x26]1803dd4cdeb40a6.png[/img]-p[img=29x26]1803dd4ce7a7dfb.png[/img]
A: p[img=29x26]1803dd4c7b6aa00.png[/img](H[img=7x22]1803dd4c8388dd2.png[/img]C[img=7x22]1803dd4c8c6be03.png[/img]O[img=7x22]1803dd4c951601c.png[/img])
B: p[img=29x26]1803dd4c9f55d1e.png[/img](H[img=7x22]1803dd4c8388dd2.png[/img]C[img=7x22]1803dd4c8c6be03.png[/img]O[img=7x22]1803dd4c951601c.png[/img])
C: [img=9x43]1803dd4cc317bfb.png[/img](p[img=29x26]1803dd4ccc4bd6a.png[/img]+p[img=29x26]1803dd4cd54d421.png[/img])
D: p[img=29x26]1803dd4cdeb40a6.png[/img]-p[img=29x26]1803dd4ce7a7dfb.png[/img]
举一反三
- 假定Sb[img=7x22]1803dd49c179016.png[/img]S[img=7x22]1803dd49c99e260.png[/img](s)的溶解度为x mol·L[img=17x22]1803dd49d248c3b.png[/img],则[img=28x28]1803dd49dafed3c.png[/img]应为( )。 A: [img=28x28]1803dd49e3a9672.png[/img]=x[img=7x22]1803dd49ec515a7.png[/img]·x[img=7x22]1803dd49f5a7624.png[/img]= x[img=7x22]1803dd49fdc3ba4.png[/img] B: [img=28x28]1803dd4a062ad6a.png[/img]=2x·3x=6x[img=7x22]1803dd4a0f09d1e.png[/img] C: [img=28x28]1803dd4a062ad6a.png[/img]=x[img=7x22]1803dd4a0f09d1e.png[/img] D: [img=28x28]1803dd4a062ad6a.png[/img]=(2x)[img=7x22]1803dd4a323468e.png[/img]·(3x)[img=7x22]1803dd4a3a6fefa.png[/img]=108x[img=7x22]1803dd4a4341475.png[/img]
- 设X,Y为两个随机变量,且[img=179x25]1803395d555effc.png[/img] , [img=226x25]1803395d61f1a43.png[/img] ,则[img=143x25]1803395d6f00057.png[/img]= ( ). A: 1/7 B: 3/7 C: 4/7 D: 5/7
- 设(X,Y)的分布律为[img=317x47]18039fa216cb556.png[/img]V=max(X,Y), 则P(V=1)等于 A: 1/7 B: 2/7 C: 3/7 D: 4/7
- 设(X,Y)的分布律为[img=317x47]18036e2ccb88792.png[/img]V=max(X,Y), 则P(V=1)等于 A: 1/7 B: 2/7 C: 3/7 D: 4/7
- 设(X,Y)的分布律为[img=317x47]18032d0bb35767f.png[/img]V=max(X,Y), 则P(V=1)等于 A: 1/7 B: 2/7 C: 3/7 D: 4/7