Comprehension Passage

Direction: Read the given passage and answer the following questions.

Acids, bases, and salts are fundamental concepts in chemistry, crucial for understanding various chemical reactions and processes. Acids are substances that release hydrogen ions (H⁺) when dissolved in water. They have a sour taste and can turn blue litmus paper red. Common examples include hydrochloric acid (HCl), found in stomach acid, and acetic acid (CH₃COOH), present in vinegar.

Bases, on the other hand, are substances that release hydroxide ions (OH⁻) when dissolved in water. They have a bitter taste and a slippery feel, and they turn red litmus paper blue.

Salts are ionic compounds composed of positive ions (cations) and negative ions (anions). They are typically formed from the neutralization of an acid with a base. 

The process of titration involves:

1
Measuring the pH of a solution directly
2
Mixing an acid and a base to observe the reaction
3
Adding a solution of known concentration to a solution of unknown concentration to determine its concentration
4
Diluting a solution to reduce its concentration

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