Which of the following will not act as an antacid?

sodium carbonate

The correct answer is 3. sodium carbonate.

Antacids are substances that neutralize stomach acidity. They contain alkaline ions that chemically neutralize stomach gastric acid, reducing damage and relieving pain. Sodium carbonate is not an antacid because it is too alkaline. It will actually increase the acidity of the stomach, making heartburn worse.

The other three substances, sodium hydrogen carbonate, magnesium hydroxide, and aluminium carbonate, are all antacids. They are all alkaline and can neutralize stomach acid. However, they have different strengths and side effects.

• Sodium hydrogen carbonate is the most common antacid. It is effective in neutralizing stomach acid, but it can also cause bloating and belching.
• Magnesium hydroxide is a more potent antacid than sodium hydrogen carbonate. It can also cause bloating and belching, but it is less likely to cause diarrhea.
• Aluminium carbonate is the least potent antacid. It is less likely to cause bloating and belching, but it can cause constipation.

If you are experiencing heartburn, it is important to talk to your doctor about the best antacid for you.