单选题称取KC10.447g和NaCl9.36g,溶于蒸馏水倒入500ml容量瓶中,稀释至刻度,此时溶液中Na+、K+浓度相当于(原子量K=39,Na=23,Cl=35.5)()A
Na+140mmol/LK+5.5mmol/LB
Na+145mmol/LK+6.0mmol/LC
Na+150mmol/LK+5.5mmol/LD
Na+155mmol/LK+5mmol/LE
Na+160mmol/LK+6.0mmol/L
题目
单选题
称取KC10.447g和NaCl9.36g,溶于蒸馏水倒入500ml容量瓶中,稀释至刻度,此时溶液中Na+、K+浓度相当于(原子量K=39,Na=23,Cl=35.5)()
A
Na+140mmol/LK+5.5mmol/L
B
Na+145mmol/LK+6.0mmol/L
C
Na+150mmol/LK+5.5mmol/L
E
Na+160mmol/LK+6.0mmol/L