Another involves collecting automobile exhaust samples and proceeding in the same way. Burn a strip of magnesium ribbon in air. Place the white, powdery magnesium oxide that results into water. The magnesium oxide reacts with the water to form magnesium hydroxide in water. Test the solution with chemical indicators.
Some shampoos advertise that they are low pH. Others advertise that they are pH-balanced.
Look at advertising to find other claims made about the acidic or basic character of products. Test some shampoos and detergents to determine their pH values. Tomatoes can be canned in a hot water bath without fear of botulism developing in the tomatoes. Corn must be canned in a pressure canner at high pressures in order to eliminate the possibiltiy of botulism. In July 1991 at St. Lazare, Manitoba, a train carrying acetic anhydride derailed.