▁for ▁hydro gen ations , ▁the ▁migration ▁of ▁double ▁b onds , ▁in ▁the ▁Me er we in - P on nd orf - Ver ley ▁reduction , ▁the ▁Michael ▁reaction , ▁and ▁many ▁other ▁re actions . ▁Both ▁Ca O ▁and ▁Ba O ▁can ▁be ▁highly ▁active ▁catal yst s ▁if ▁they ▁are ▁treated ▁with ▁high ▁temperature ▁heat . ▁ ▁Us es ▁of ▁bases ▁S od ium ▁hydro x ide ▁is ▁used ▁in ▁the ▁manufact ure ▁of ▁soap , ▁paper , ▁and ▁the ▁synth etic ▁fi ber ▁ray on . ▁Cal ci um ▁hydro x ide ▁( s la ked ▁l ime ) ▁is ▁used ▁in ▁the ▁manufact ure ▁of ▁ble aching ▁pow der . ▁Cal ci um ▁hydro x ide ▁is ▁also ▁used ▁to ▁clean ▁the ▁sul fur ▁dio x ide , ▁which ▁is ▁caused ▁by ▁the ▁exhaust , ▁that ▁is ▁found ▁in ▁power ▁plants ▁and ▁fact ories . ▁Mag nes ium ▁hydro x ide ▁is ▁used ▁as ▁an ▁' ant ac id ' ▁to ▁neutral ize ▁excess ▁acid ▁in ▁the ▁st om ach ▁and ▁c ure ▁ind ig estion . ▁S od ium ▁carbon ate ▁is ▁used ▁as ▁was hing ▁s oda ▁and ▁for ▁soft ening ▁hard ▁water . ▁S od ium ▁b ic ar bon ate ▁( or ▁sod ium ▁hydro gen ▁carbon ate ) ▁is ▁used ▁as ▁b aking ▁s oda ▁in ▁cook ing ▁food , ▁for ▁making ▁b aking ▁pow ders , ▁as ▁an ▁ant ac id ▁to ▁c ure ▁ind ig estion ▁and ▁in ▁s oda