In the Wurtz reaction, a haloalkane is treated with sodium in dry ether to yield an alkane having double the number of carbon atoms.
ɪnðə wˈɜːts ɹɪˈækʃən, ɐ hˈeɪloʊlkˌeɪn ɪz tɹˈiːɾᵻd wɪð sˈoʊdiəm ɪn dɹˈaɪ ˈiːθɚ tə jˈiːld ɐn ˈælkeɪn hˌævɪŋ dˈʌbəl ðə nˈʌmbɚɹ ʌv kˈɑːɹbən ˈæɾəmz.