Mam nauczyć się wykonać to zadani inaczej nie zdam. Proszę o pomoc.
Oblicz zawartość procentową (procent masowy) metali w solach.
a) AlCl3
b)Na2SO4
c)Pb(NO3)2
Potrzebne mi to na teraz.
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alClз
27u+3*35u = 132u
132u-100%
27u-x
x = 27*100 / 132 = 20,45%
Na₂SO₄
2*23u+32u+4*16 = 142u
142u = 100%
46u = x
x = 46 * 100/142 = 32,40%
Pb(NO₃)₂
207u+2*14u + 6*16u = 331u
331u = 100%
207u = x
x= 207 * 100/331 =62,54%
alClз
27u+3*35u=132u
132u---100%
27u----x
x=27*100/132=20,45%
Na₂SO₄
2*23u+32u+4*16=142u
142u====100%
46u====x
x=46*100/142=32,40%
Pb(NO₃)₂
207u+2*14u+6*16u=331u
331u====100%
207u====x
x=207*100/331=62,54%