常温下,有两种溶液:
①0.1mol•L-1CH3COOH ②0.1mol•L-1 CH3COONa
(1)溶液①的pH______7(填“>”“<”或“=”),溶液中离子的电荷守恒的关系式是______.
(2)下列说法正确的是______(填序号).
a.两种溶液中c(CH3COO-)都等于0.1mol•L-1
b.两种溶液中c(CH3COO-)都小于0.1mol•L-1
c.CH3COOH溶液中c(CH3COO-)小于CH3COONa溶液中c(CH3COO-)