`6. A`
`m dd =3000.1,115= 3345` (g)
`=> mNaOH = 3345.10%=334,5` (g)
`7. D`
`mNaOH = 60` (g)
thêm `x` gam `H2O`
` % NaOH = (60)/(500+x).100=8%`
` => x=250`
`10. D`
` mHCl = 20.37%=7,4` (g)
thêm `x` gam `H2O`
` % HCl = (7,4)/(20+x).100=13%`
` => x = 37` (g)
`13. B`
` m ddH2SO4 = 100.1,84 =184` (g)
`mH2SO4 = 184.98%=180,32` (g)
thêm` x` gam `H2O`
` % H2SO4 = (180,32)/(184+x).100=20%`
` => x= 717,6 `
`14. C`
` m dd H2SO4 = 1000.1,84=1840` (g)
`=> mH2SO4 = 1803,2` (g)
thêm ` x` gam `H2O`
`(1803,2)/(1840+x).100=10%`
`=> x= 16192 (g) => V = 16,192` (l)
