Acids Alkalis 1. Acids are sour in taste 1. Alkalis are bitter in taste 2. Acids have a pH less than 2. Alkalis have a pH greater 7 than 7 3. Acids turn blue litmus paper blue 3.Alkalis turn red litmus paper blue 4. Acids dissolve in water to make solutions that 4.Alkalis dissolve in water to produce hydroxide ions conduct electricity 5. An acid accepts electrons 5.An alkali donates electrons 6. Acid donates protons 6.Akalis receive protons Properties of Acids and Alkalis