(1)95 = 4.8g×5% =0.24g CH3COOH + NaOH = CH3COONa + H2O 60 40 m(CH3COOH) 0.24g == m(CH3COOH) =0.36g 則100mL樣品中含CH3COOH:0.36g ×10 = 3.6g 所以該食醋合格 查看更多

 

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解:(1)95       (2分)   

(2)m(NaOH)= 4.8g×5% =0.24g    (1分)

CH3COOH  +  NaOH  =  CH3COONa  +  H2O

          60           40

m(CH3COOH)  0.24g

m(CH3COOH) = 0.24g× = 0.36g                                     (1分)

則100mL樣品中含CH3COOH:0.36g × = 3.6g

合格                                                                 

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