fermentacji alkoholowej poddano 500g roztworu glukozy , w wyniku czego uzyskano 56dm3 tlenku węgla (4)i etanol. napisz równanie fermentacji glukozy i oblicz stężenie procetowe roztworu glukozy.
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C₆H₁₂O₆ --enzymy--> 2C₂H₅OH + 2CO₂
180g glukozy x
---------------------- = ------------------
44,8dm³ CO₂ 56dm³ CO₂
x = 225g glukozy
ms = 225g
mr = 500g
cp = ms/mr x 100%
cp = 225g/500g x 100% = 45%
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C₆H₁₂O₆ -------enzymy------> 2C₂H₅OH + 2CO₂
MC₆H₁₂O₆=6*12g/mol+12*1g/mol+6*16g/mol=72g/mol+12g/mol+96g/mol=180g/mol
MCO₂=12g/mol+2*16g/mol=12g/mol+32g/mol=44g/mol
2*44g/mol=88g/mol
22,4dm³ - 44g CO₂
xdm³ - 88g CO₂
x=(22,4dm³*88g CO₂)/44g CO₂=44,8dm³
180g C₆H₁₂O₆ - 44,8dm³ CO₂
xg C₆H₁₂O₆ - 56dm³ CO₂
x=(180g C₆H₁₂O₆*56dm³ CO₂)/44,8dm³ CO₂=225g C₆H₁₂O₆
ms=225g
mr=500g
Cp=?
Cp=(ms*100%)/mr
Cp=(225g*100%)/500g=45%
Cp=45%