GRUPA „A”
ZADANIE —1.
Cp=15%
mr = 25kg - (25000g)
mt= Cp*m, / 100%= 15% * 25000g/100%= 3750g 25000g-3750g = 2!250g
ZADANIE--2.
NfeSOi * SOHiO
2*23+32+4*16= 142 J0*(2*l+16)= 180 142+180=
322g
m,= 750g Cp= 17.5% ms=?
17,5%=m, / 750g * 100% m5= 750g * 17,5%/100%= 131,25g 322g NaaSOj * 10H2O zawiera 142 g NsaSOi x 131,25 g Na2S04
x= 322g * 131,25 / 142g = 297,62 g
Cm= 0,125 mol/dm3 v= 2,5 dm3
0,125= n/2,5
n= 0,125 *2,5 = 03125 mol KCL
39+35,5= 74,5g
Imol KCL waży 74,5g
Oj 125 mola x
x= 0,3125 mol * 74,5g/ łmol = 23,28g
ZADANIE-----4,
ms= 48g m,= 250g
Cp= 48g / 48g + 250g * 100% = 16,10%
ZADANIE------5.
12,5%= ms/ 500g * 100% ms= 12.5% * 5!%/ 100%= 62.5g 500g - 62,5g = 437,5g v=m/d
v—437,5 / 0,82= 533,53
20 — 100% x — 25%
x= 20fcg * 25% /109% = 5kg 20 leg - 5kg= 15kg
ZADANIE----2.
mR= 550g Cp= 12,5% ms=?
12,5%= m, / >jog * uw%
ms= 550g * 12,5% / 100% = 68,75g
ZnS04 * 7 H20
65+32+4*16= 161 7*(2*1+16)= 126 161+126 = 287g
287g ZnS04 * 7 H20 zawiera 161 g ZnS04 x 68,75g ZnS04
x= 287g * 68,75g i 161 g = 122,55g
ZADANIE--3.
Cm= 0,0175 mol/dm3 v= l,5dm3
n= 0,0175 mol/dm3 * l,5dm3
li= 0,026 mol
AlBr2
27+3* 80= 267g Imol Al Br3 waży 267g 0,026 moia x
x=0,026mol * 265g / Imol = 6,942g
ZADANIE — 4, ms= 75g
,*»,+ 95£lg
Cp=75 /75+950 * 100%= 7 jl%
ZADANIE------5.
7,5%= m, / 200g * 100%
m, = 7,50% * 200g/100%= ISg
200g- 15g= 185g
v— ia,; u
v= 185 70,76 =243,42