单项选择题
A.2×10-5 B.5×10-10 C.5×10-5 D.2×10-19
When 500mL of 0.10mol·L-1 NaOH is reacted with 500ml of...
单项选择题When 500mL of 0.10mol·L-1 NaOH is reacted with 500ml of 0.20mol·L-1 HCl the final concentration of H+ is()
A.0.10mol·L-1 B.0.20mol·L-1 C.0.050mol·L-1 D.10-7mol·L-1
A certain weak acid is 10% dissociated in 1.0mol·L-1 so...
单项选择题A certain weak acid is 10% dissociated in 1.0mol·L-1 solution.In 0.10mol·L-1 solution,the percentage of dissociation would be()。
A.greater than10 B.10 C.less than10 D.zero
Which one of the following ions would give a basic solu...
单项选择题Which one of the following ions would give a basic solution upon addition to water?()
A.NH4+ B.Na+ C.C2H3O2- D.NO3-