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Answer 1 · 2016-10-18T15:44:11

You might get $"1,3,5-trinitrobenzene."$

Conc. nitric acid and conc. sulfuric acid mixed together form the classic nitrating mixture that delivers the $NO_2^+$ electrophile:

$H_2SO_4(aq) + HNO_3(aq) rarr H_2NO_3^(+) + HSO_4^-$

Sulfuric acid protonates nitric acid, which then spits out water and nitronium ion:

$H_2NO_3^(+) rarr H_2O + NO_2^(+)$

The nitronium ion, which is linear, is a potent electrophile, and will react with nucleophiles such as an aromatic ring.

$C_6H_5NO_2 + NO_2^(+) +HSO_4^(-) rarr 1,3-C_6H_4(NO_2)_2 +H_2SO_4$ .

Another equiv of nitronium ion might give $1,3,5-C_6H_3(NO_2)_3$

The nitro group is a $"meta-director."$