MediumChemistryHigh School (9–10)GeneralAcids, Bases and Salts › pH and NeutralisationAcids, Bases and Salts › Acids and BasesNumerical
How many antacid tablets, each with 0.50 g of magnesium hydroxide, are needed to neutralise 250 mL…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
How many antacid tablets, each with of magnesium hydroxide, are needed to neutralise of hydrochloric acid? . Use .
Need a reminder? The key ideaShow
Stomach acid is hydrochloric acid of pH about ; antacids are mild bases. Tooth enamel dissolves below pH ; toothpaste is basic. Bee and ant stings are acidic, so a mild base helps. Acidic soil gets lime.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Acid. of HCl.
Step 2. Base. of , which is .
Step 3. Tablets. , so tablets.
Answer: tablets.
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