溶液质量M=p*V=1.2*500=600g,溶质NaOH质量m1=M*5%=30g,水质量m2=M-m1=600-30=570g
M=p*V=1.2*500=600g,溶质NaOH质量m1=M*5%=30g,水质量m2=M-m1=600-30=570g