🧪 Topic Summary
Acids, bases, and neutral substances are fundamental concepts in chemistry. Acids are substances that donate hydrogen ions ($H^+$) or accept electrons, resulting in a pH less than 7. They often taste sour. Bases, on the other hand, accept hydrogen ions or donate electrons, leading to a pH greater than 7. They often taste bitter and feel slippery. Neutral substances have a pH of 7, indicating a balance of $H^+$ and hydroxide ($OH^-$) ions, like pure water.
This worksheet will test your understanding of these concepts through vocabulary matching, fill-in-the-blanks, and critical thinking.
🗂️ Part A: Vocabulary
Match the following terms with their correct definitions:
- Acid
- Base
- pH Scale
- Neutralization
- Indicator
Definitions:
- A substance that accepts hydrogen ions.
- A substance that donates hydrogen ions.
- A reaction between an acid and a base that forms water and a salt.
- A measure of the acidity or basicity of a solution.
- A substance that changes color in the presence of an acid or base.
[Write your answers here, e.g., 1-B, 2-A, etc.]
✍️ Part B: Fill in the Blanks
Complete the following paragraph using the words provided below:
(Words: acidic, basic, neutral, 7, litmus)
A substance is considered _______ if it has a pH less than _______. A substance is _______ if it has a pH greater than 7. A _______ substance has a pH of 7. One common indicator is _______ paper, which turns red in _______ solutions and blue in _______ solutions.
🤔 Part C: Critical Thinking
Explain why it is important to know whether a substance is acidic, basic, or neutral in everyday life. Provide at least two specific examples.