IB Chemistry SL 3.2.1 Organic formulas Question Bank

Practise IB Chemistry SL 3.2.1 by deducing molecular, empirical and structural formulas for common organic compounds.

Exam points

Deduce a structural formula from a name, reaction scheme or displayed fragment.
Convert between a molecular formula and an empirical formula by simplifying the ratio of atoms.
Use formula evidence to distinguish an alkane, alkene, alcohol or other organic compound.

[Maximum number: 2]

Strychnine, $\mathrm{C}_{21} \mathrm{H}_{22} \mathrm{~N}_{2} \mathrm{O}_{2}\left(M_{\mathrm{r}}=334.4\right)$ , is a white crystalline solid obtained from plants.

(a)

The formula of strychnine is:

Figure for Question (a) — IB Chemistry SL

[ 2 ]

(i)

State the type of structural formula shown.

[ 1 ]

(ii)

State the number of rings in strychnine's structure.

[ 1 ]

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3.2.1—Organic formulas question 1

Question (a)

Question (i)

Question (ii)