WAEC - Chemistry (2024 - No. 23)
Which of the following household liquids would be effective in treating someone with too much acid in the stomach?
Strong salt solution with pH 7.0
Tomato juice with pH 4.1
Milk of Magnesia with pH 10.5
Black coffee with pH 5.0
Wyjaśnienie
Milk of magnesia is alkaline because it has a pH of 10.5, which means that it would neutralize any acidic substance encountered. Hence, it is an excellent antacid. It neutralizes excess stomach acid or hydrochloric acid. The hydroxide ions of the milk combine with the hydrogen ions in the stomach acid to reduce excess acidity in the stomach.