Question

初三化学100mL1.0mol/L的KOH溶液中所含溶质的质量是?200ml含H2SO4 98g的硫酸溶液的溶质的物质的

Answer 1

100mL=0.1L

n=V*（乘以）C=1*0.1=0.1mol

m=n*M=0.1mol*56g/mol=5.6g

n=m/M=98g/98g/mol=1mol

200mL=0.2L

C=n/V=1mol/0.2L=5mol/L

(1)5.6g

(2)5mol/L