1.配制10cm3 1mol/L的NaCl 溶液,应称量NaCl( )g A.0.5 B.1 C.3 D.0.5851.配制10cm3 1mol/L的NaCl 溶液,应称量NaCl( )gA.0.5 B.1 C.3 D.0.585

问题描述:

1.配制10cm3 1mol/L的NaCl 溶液,应称量NaCl( )g A.0.5 B.1 C.3 D.0.585
1.配制10cm3 1mol/L的NaCl 溶液,应称量NaCl( )g
A.0.5 B.1 C.3 D.0.585

(10/1000)x 1x58.5=0.585(g)

配制10cm3 1mol/L的NaCl 溶液,应称量NaCl(0.585 )gA.0.5 B.1 C.3 D.0.585
58.5*10/1000=0.585

1.配制10cm3 1mol/L的NaCl 溶液,应称量NaCl( D.0.585 )g

D,NaCl的摩尔质量是58.5g/mol,所以58.5*10/1000就OK了