pH measures acidity or basicity of solutions on scale 0-14. Neutral pH is 7, acidic below 7, basic above 7. pH specifically refers to hydrogen ion concentration in aqueous solutions
Corrosive substances can destroy living tissue, organic compounds and metals. Class 8 corrosives pose serious risks to people, property and environment. Cell and tissue destruction is visible, irreversible and can be fatal
Acids donate protons (H+) and bases accept protons (H+). Acids have pH below 7, bases above 7. Acids taste sour, bases taste bitter and feel slippery. Acids turn blue litmus red, bases turn red litmus blue
Hydronium and hydroxide ions are present in all aqueous solutions. Solutions are neutral if [H3O+] = [OH−]. At 25°C, Kw = 1.0 × 10−14, so pH + pOH = 14.00. Pure water has pH = 7.00 and pOH = 7.00
pH stands for "potential of hydrogen". pH measures hydrogen ion activity in solutions. Scale ranges from 0 to 14, with 7 being neutral. Each whole number unit represents tenfold change in hydrogen ion concentration
Oxide is a chemical compound containing oxygen and another element. Oxygen forms stable compounds with metals and non-metals. Most earth's crust is composed of solid oxides