The production of pure alkali metals is somewhat complicated due to their extreme reactivity with commonly used substances, such as water.
ðə pɹədˈʌkʃən ʌv pjˈʊɹ ˈælkəlˌaɪ mˈɛɾəlz ɪz sˈʌmwʌt kˈɑːmplᵻkˌeɪɾᵻd dˈuː tə ðɛɹ ɛkstɹˈiːm ɹɪɐktˈɪvᵻɾi wɪð kˈɑːmənli jˈuːzd sˈʌbstənsᵻz, sˈʌtʃ ɐz wˈɔːɾɚ.