按要求回答下列问题:
\(\rm{(1)}\)常温下,向\(\rm{VL}\) \(\rm{0.1mol/L}\)的醋酸溶液中加水稀释,下列说法中正确的是 ______ \(\rm{(}\)填字母\(\rm{)}\)
A.溶液中导电粒子的数目将减少
B.由水电离的\(\rm{c(H^{+})}\)浓度将减小
C.溶液中\(\rm{ \dfrac {c(CH_{3}COO^{-})}{c(H^{+})}}\)不变
D.溶液中\(\rm{ \dfrac {c(CH_{3}COO^{-})}{c(CH_{3}COOH)\cdot c(OH^{-})}}\) 将减小
E.醋酸的电离程度将增大,\(\rm{c(H^{+})}\)也增大
\(\rm{(2)①}\)常温下,将\(\rm{0.1mol/L}\)的硫酸\(\rm{V_{1}mL}\)与\(\rm{0.1mol/LNaOH}\)溶液\(\rm{V_{2}mL}\)混合后,溶液的\(\rm{pH=1}\)则\(\rm{V_{1}}\):\(\rm{V_{2}=}\) ______ \(\rm{(}\)忽略溶液体积的变化\(\rm{)}\).
\(\rm{②}\)常温下,若溶液由\(\rm{pH=3}\)的盐酸\(\rm{V_{1}mL}\)与\(\rm{pH=11}\)的某碱\(\rm{BOH}\)溶液\(\rm{V_{2}mL}\)混合而得,则下列假设和结论都正确的是 ______ \(\rm{(}\)填字母\(\rm{)}\)
A.若混合后溶液呈中性,则\(\rm{c(H^{+})+c(OH^{-})=2×10^{-7}mol/L}\)
B.若\(\rm{V_{1}=V_{2}}\),则混合后溶液的\(\rm{pH}\)一定等于\(\rm{7}\)
C.若\(\rm{V_{1}=V_{2}}\),则混合后一定有:\(\rm{c(Cl^{-}) > c(B^{+}) > c(H^{+}) > c(OH^{-})}\)
D.混合后的溶液中一定有\(\rm{c(B^{+})+c(H^{+})=c(Cl^{-})+c(OH^{-})}\)
\(\rm{(3)}\)常温下,浓度均为\(\rm{0.1mol/L}\)的五种溶液的\(\rm{pH}\)如下表所示:
溶液 | \(\rm{CH_{3}COONa}\) | \(\rm{NaHCO_{3}}\) | \(\rm{Na_{2}CO_{3}}\) | \(\rm{NaClO}\) | \(\rm{NaCN}\) |
\(\rm{pH}\) | \(\rm{8.8}\) | \(\rm{9.7}\) | \(\rm{11.6}\) | \(\rm{10.3}\) | \(\rm{11.1}\) |
\(\rm{①}\)写出向\(\rm{NaClO}\)溶液中通入少量\(\rm{CO_{2}}\)的离子方程式 ______ .
\(\rm{②}\)将浓度均为\(\rm{0.01mol/L}\)下列溶液分别加水稀释\(\rm{10}\)倍,\(\rm{pH}\)变化最小的是 ______ \(\rm{(}\)填字母\(\rm{)}\)
A.\(\rm{HCN}\) \(\rm{B.HClO}\) \(\rm{C.H_{2}CO_{3}}\) \(\rm{D.CH_{3}COOH}\)
\(\rm{③}\)常温下,等浓度的醋酸与醋酸钠组成的混合溶液\(\rm{pH=6}\),则\(\rm{c(CH_{3}COO^{-})-c(CH_{3}COOH)=}\) ______ \(\rm{(}\)填准确数值\(\rm{)}\).
\(\rm{(4)}\)已知常温下\(\rm{K_{sp}(AgCl)=1.0×10^{-10}}\),\(\rm{K_{sp}(CH_{3}COOAg)=9.0×10^{-4}.}\)常温下,\(\rm{CH_{3}COOAg}\)若要在\(\rm{NaCl}\)溶液中开始转化为\(\rm{AgCl}\)沉淀,则\(\rm{NaCl}\)的浓度必须不低于 ______ .