2K + 2H2O = 2KOH + H2
2KOH + CO2 = K2CO3 + H2O
1)
x+y=10
x/(x+y)=0.05
y=10-x
x/(x+10-x)=0.05
x/10=0.05
x=0.05*10
x=0.5
y=10-0.5=9.5
2)
(200*0.12+120*0.26)/(200+120)*100=17.25%
3)
(40*0.7)/(x+40)=0.09
28/(x+40)=0.09
28=0.09*(x+40)
0.09x+3.6=28
0.09x=28-3.6
0.09x=24.4
x=24.4/0.09
x=271.111111 грамм
4)
(300*0,33)/(300-130)*100=58,235294117647058823529411764706%
<em>Fe+2HCl = FeCl2+H2</em>
<em>FeCl2+2NaOH = Fe(OH)2+2NaCl</em>
<em>Fe(OH)2+Na2SO4 = FeSO4+2NaOH</em>
<em>Al2(SO4)3+6NaOH=2Al(OH)3+3NaSO4</em>
<em><span>Al(OH)3+3HCl =AlCl3+3H2O</span></em>
<em>AlCl3 + 3AgNO3 = Al(NO3)3 + 3AgCl3</em>
<em>MgCl2+K2CO3 = MgCO3+2KCl </em>
<em>NH4CL + NAOH = NH3 + H2O + NACL</em>
SO3+H2O=H2SO4
n(SO3)=m\M=40\80=0,5 моль
n(H2SO4)=0,5моль*98=49