[خالد السعيد زكى]

ردا على أسئلة رؤى عبدالله وسأجيبب ب E لأنه واضح أنك فى مدرسة لغات

1st: because hydroxyl group is polar group & water is polar solvent
2nd: CH3COOH + NaHCO3 → CH3COONa + H2O + CO2 ↑

3rd:
in case of dilute solution : [IMG]file:///C:/DOCUME%7E1/kh/LOCALS%7E1/Temp/msohtml1/02/clip_image001.gif[/IMG][IMG]file:///C:/DOCUME%7E1/kh/LOCALS%7E1/Temp/msohtml1/02/clip_image002.gif[/IMG]Fe+ 4HNO3 Fe (NO3)3 + 2H2O + NO↑
fe is reducing agent(oxidized) & acid is oxidizing agent(reduced)
in case of conc. solution :
reaction is not going on due to form of oxidized layer