Write the complete mechanism of bromination of benzaldehyde by a mixture of hydrobromic acid and potassium bromate in acetic acid. Consider bromination at the 4 and 3 position (para and meta), and explain, by showing the relevant resonance structures, why bromination preferentially takes place at the meta position.

At a certain temperature the rate of this reaction is first order in hi with a rate constant of : 0.0632s2hig=h2g+i2g suppose a vessel contains hi at a concentration of 1.28m . calculate how long it takes for the concentration of hi to decrease to 17.0% of its initial value. you may assume no other reaction is important. round your answer to 2 significant digits.