<span>C → CO</span>₂<span> → Na</span>₂<span>CO</span>₃<span> → CO</span>₂<span> → CaCO</span>₃
<span><span>
1) </span>C + O</span>₂<span> → CO</span>₂<span>;</span>
<span><span>2) </span>CO</span>₂<span> +
2NaOH →<span>
Na</span></span>₂<span><span>CO</span></span>₂<span><span> + H</span></span>₂<span><span>O;</span></span>
<span><span>3) </span><span>Na</span></span>₂<span><span>CO</span></span>₃<span><span> + 2HCl </span>→ 2NaCl + CO</span>₂<span>↑
+ H</span>₂<span>O;</span>
<span><span>4) </span><span>CO</span></span>₂<span><span> +
Ca(OH)</span></span>₂<span><span> </span>→ CaCO</span>₃<span>↓<span> + H</span></span>₂<span><span>O</span></span>
Дано:
m(Na₂O ·CaO· 6 SiO₂)=10кг
Найти:
m(Na2CO3)-?
m(CaCO3)-?
m(SiO2)-?
Решение:
хкг у кг z кг t° 10кг
Na2CO3+CaCO3+6SiO2 ---->Na₂O ·CaO· 6 SiO₂ + 2CO2
106г 100г 360г 478г
х= 106*10/478=2.21кг m(Na2CO3)
у=100*10/478=2,09кг m (CaCO3)
z=360*10/478=7,53кг m (SiO2)
Ответ: m(Na2CO3)=2,21кг
m (CaCO3)= 2,09кг
m (SiO2)=7,53кг
N(Cr)=68.4/52=1 моль
n(O)=31.6/16=2 моль
CrO2
CH2=CH2 гомолог этен
СН3=СН-СН2 -СН-СН3
|
СН3
изомер 4метилпентен-1