Problem: Solve the given worksheet on acids and bases.
#### Worksheet Questions and Solutions:
1.
True or False. Acids and bases are common in everyday places such as the kitchen.
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Answer: True
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Explanation: Acids and bases are indeed common in everyday life, especially in the kitchen. For example, vinegar is an acid, and baking soda is a base.
2.
Give an example of an acid found in something you can eat.
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Answer: Lemon juice (citric acid)
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Explanation: Lemon juice contains citric acid, which is a common acid found in food.
3.
True or False. Acids and bases react with each other when they are put together. (Think of the vinegar and baking soda).
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Answer: True
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Explanation: Acids and bases undergo neutralization reactions when mixed. For example, vinegar (acetic acid) reacts with baking soda (sodium bicarbonate) to produce carbon dioxide gas, water, and sodium acetate.
4.
What is the environment like inside of your stomach?
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Answer: Acidic
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Explanation: The stomach contains hydrochloric acid (HCl), which helps in digestion by breaking down food and killing harmful bacteria.
5.
The pH scale goes from
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Answer: 0 to 14
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Explanation: The pH scale ranges from 0 to 14, where values below 7 indicate acidity, 7 indicates neutrality, and values above 7 indicate basicity.
6.
Acids have pH numbers _______ than 7.
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Answer: less than
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Explanation: Acids have pH values less than 7. For example, lemon juice has a pH around 2.
7.
Bases have pH numbers _______ than 7.
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Answer: greater than
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Explanation: Bases have pH values greater than 7. For example, baking soda has a pH around 9.
8.
A substance with a pH of 7 like distilled water is called _______.
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Answer: Neutral
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Explanation: A pH of 7 indicates that a substance is neither acidic nor basic; it is neutral.
9.
Acidic solutions have lots of _______ ions present.
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Answer: Hydrogen (H⁺)
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Explanation: Acids dissociate in water to produce hydrogen ions (H⁺).
10.
A pH _______ is something that can be used to determine the pH of a solution.
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Answer: Indicator
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Explanation: A pH indicator is a substance that changes color depending on the pH of a solution, helping to determine whether the solution is acidic, basic, or neutral.
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Final Answer:
\[
\boxed{
\begin{array}{l}
1. \text{True} \\
2. \text{Lemon juice (citric acid)} \\
3. \text{True} \\
4. \text{Acidic} \\
5. \text{0 to 14} \\
6. \text{less than} \\
7. \text{greater than} \\
8. \text{Neutral} \\
9. \text{Hydrogen (H⁺)} \\
10. \text{Indicator}
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of worksheets acids bases and salts.
