pH:

1. What is pH? 

 pH is a measure of how acidic or basic the solution is.

2. What are pH values?

The pH count with a scale of 0-14. Many acidic solutions have lower pH values, and a solition with pH -0 is highly acidic and with pH -7 is neutral, pH -14 is extremely basic.

 Do this values depend on something? Explain your answer.

It depends on the scale rage in  the pH scale is from 0-14 where pH-0 is highly acidic and 14 is extremely basic.

3.check chart 3.2 about acids and bases. What can you explain about? 

Acids are substance that contain hydrogen and produce hydronium ions when they dissolve in water.

The hydronium are positively charged.

Some acids acids can burn and damage the body tissue if we don't use it correctly.

4.what is neutralization? Is a chemical reaction  in which strong acid and stong base react  with each other to form water and salt.

Example:

When you have an acidic stomach due to eating too much spicy food, can be reliieved by taking an antacid. The antacid is basic and help neutralize the stomach's acidic environment.