17.实验室常用98%(p=1.84g/mol)的浓硫酸配制1:4的稀硫酸,此稀硫酸的密度为1.23g/ml,其物质的量浓度为 ( C. 3.88mol/L)设取1L浓硫酸和4L水混合H2SO4物质的量=(1.84*1000*98%)/98=18.4mol混合后体积=(1.84*1000+1*4000)/1.23=4748mL=4.748Lc=18.4/4.748=3.88mol/L28.有五瓶溶液分别是①10mL0.60mol/LNaOH水溶液②20mL0.5mol/LH2SO4水溶液③30mL0.40mol/LHCl水溶液④40mL0.30mol/LCH3COOH水溶液⑤50mL0.20mol/L...