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When a suspected drunk driver blows 184 mL of his breath through the fuel-cell breathalyzer, the breathalyzer produces an average of 325 mA of current for 10 s. Assuming a pressure of 1.0atm and a temperature of 25 C, what percent (by volume) of the driver's breath is ethanol? I am still...

In a experiment CH3COOH and Na2SO4 - suggest a reason that acetic acid, instead of an acid such as hydrocholric acid , is used to provide hydrogen ion to be reduced in the electrolytic cell Why is it necessary to add Na2SO4 to the acetic acid solution?

Determine the solubility and solubility constant of PbCl2 (gmm=278.1). The dissolved Cl in the filtered solution was precipitated as AgCl by the addition of excess AgNO3 solution, dried and weighed. Here is my data: Temp 20.2 degrees Celsius Volume of PbCls solution analyzed, 25.00 mL mass of...

in the determination of an equilibrium constant for a weak acid, why is not necessary to know the exact concentration of a weak acid?