a)
m.apa = 450 g , md = 50 g,
stim ca w% = mdx100/ms
=> ms = m.apa + md = 450 + 50
= 500 g
=> w = 50x100/500 = 10%
b)
w = 15% , ms = 200 g
stim ca w% = mdx100/ms
=> md = msxw%/100
= 200x15/100 = 30 g
ms = m.apa + md
=> m.apa = ms-m.apa = 200-30
= 170 g apa
c)
m.apa = ro(apa) x V = 1x60 = 60 g,
md = 12 g glucoza
stim ca w% = mdx100/ms
=> ms = m.apa + md =60+12 = 72 g
=> w = 12x100/72 = 16,67%
d)
m.apa = 270 g , w% = 20%
ms = md + m.apa = a + 270
md = a
=> 20% = 100a/(a+270)
= 20x(a+270) = 100a
= 0,2a + 54 = a
=> a = 54/0,8 = 67,5 g HCl
