1) Below are some common foods and their pH values. Which ones are most likely to cause "heartburn"? Explain why you made those choices.
soda, 2.0-4.0; lemon juice, 2.00- 2.60; tofu, 7.20; tomatoes, 4.0-4.4; cow's milk, 6.40- 6.80; tea, 7.20; black coffee, 5.0- 5.1; cooked white rice, 6.00- 6.70
2) Explain the technique of back- tiltration.
3) Some antacids will generate carbon dioxide, CO2, when they neutralize the acid in gastric juice. Write the NET EQUATION for the reaction of the antacid containing the anion carbonate, CO 2/3-, or the anion bicarbonate, HCO3-, with acid (H+).
4) Write the net ionic equation for the neutralization of the bases, magnesium hydroxide, Mg(OH)2 and aluminum hydroxide, Al(OH)3, found in Maalox, for example, with acid (H+).