单项选择题
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……
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/L;K+5.5mmol/L
B.Na+145mmol/L;K+6.0mmol/L
C.Na+150mmol/L;K+5.5mmol/L
D.Na+155mmol/L;K+5mmol/L
E.Na+160mmol/L;K+6.0mmol/L