Đổi: 250ml dung dịch NaOH = 0.25l dung dịch NaOH
==> nNaOH = CM.V = 0.25 x 1 = 0.25 (mol)
mNaOH = n.M = 0.25 x 40 = 10 (g)
Vậy trong 250ml dung dịch NaOH 1M có 10g NaOH
Ta có:\(C_{M_{NaOH}}=\frac{n_{NaOH}}{V_{dd_{NaOH}}}=>n_{NaOH}=1.0.25=0.25\left(mol\right)\)
mNaOH=nNaOH.MNaOH=0.25.(23+16+1)=10(g)
so mol cua NAOH:Doi250ml=0,25l
nNAOH=0,25.1=0,25(mol)
Khoi luong cua NAOH:
mNAOH:0,25.58,5=14.625(g)