Properties of acids:#Physical properties=They are sour to taste. Depending on the temperature, acids can occur in solid, liquid or gaseous form.#Chemical properties=*They are proton donors*They have pH less than 7*They increase H+ ion concentration in solution*Acids neutralize bases producing a salt and water*Acids turn blue litmus to red*Acids react with active metals to produce hydrogen. E.g. of acids: HNO3 – nitric acid, HCl – hydrochloric acid, HC2H3O2 – acetic acid etc. Properties of bases:#Physical properties=They are bitter to taste and soapy to touch. Frequently they are solids except ammonia which is a gas.#Chemical Properties*They are proton acceptors*They have pH more than 7*They increase OH- ion concentration in solution*Bases neutralize acids producing a salt and water*Bases turn red litmus to blue*React with oils and greases (that's why they're used as drain and window cleaners)E.g. of bases: LiOH, NaOH, KOH etc.