A:c(CH3COOH)<c(Na+)
B:c(CH3COO﹣)>c(Na+)>c(H+)>c(OH﹣)
C:c(CH3COOH)+c(H+)═c(CH3COO﹣)+c(OH﹣)
D:c(CH3COOH)+c(CH3COO﹣)═0.02 mol/L
物理变化和化学变化的关系( )
计算
0.125×4×0.25×8÷0.2÷0.5=____
7+4=____