“Hello everyone, welcome to our science and technology class. Today, we will be discussing commonly used substances as acids. Let’s start with baking soda, also known as sodium bicarbonate. This substance is commonly used in baking and can also be used as an antacid to neutralize stomach acid.

Next, we have milk of magnesia, which contains magnesium hydroxide. This substance is also used as an antacid and can help relieve constipation.

Moving on, we have ammonia solution, which is commonly used as a cleaning agent. It is a strong base and can be dangerous if not handled properly.

Soap is another substance that can be acidic. It is commonly used for cleaning and can help remove dirt and oil from our skin.

Bleach, also known as sodium hypochlorite, is a strong oxidizing agent and can be used as a disinfectant. It is important to handle bleach with care as it can be harmful if ingested or inhaled.

Antacids containing calcium carbonate are also commonly used to neutralize stomach acid.

Toothpaste contains basic compounds such as calcium carbonate and sodium fluoride, which help to protect our teeth from decay.

Lastly, we have oven cleaner, which contains basic compounds such as sodium hydroxide. This substance is used to remove tough stains and grease from ovens.

That’s it for today’s lesson on commonly used substances as acids. I hope you found this information helpful. Thank you for listening and see you in our next class!”