Question

The breathalyzer test utilizes the reaction between the dichromate ion and ethanol to produce acetic acid. Balanced equation for this process is given below. How much acetic acid can be produced from a mixture containing an excess of dichromate ion and 7.62 × 10−1 g of ethanol?

16H+ + 2Cr2O72− + 3CH3CH2OH → 3CH3COOH + 4Cr3+ + 11H2O

Answer 1

$n(CH3CH2OH)=\dfrac{0.762g}{46.07g/mol}=0.01654moles$

$n(CH3CH2OH)=n(CH3COOH)=0.01654moles$

$m(CH3COOH)=0.01654moles*60.05g/mol=0.993g$