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Chapter 8: Problem 1

Fill in the blanks with the correct vocabulary word. A base has a(n) _________ value above 7.

Short Answer

Expert verified
alkaline

Step by step solution

01

Understanding the pH Scale

The pH scale ranges from 0 to 14 and measures how acidic or basic a substance is. A pH value below 7 indicates an acidic solution, while a pH value above 7 indicates a basic (or alkaline) solution.
02

Determining the Property of a Base

Bases are substances that have certain properties, including a pH value greater than 7. This means they are alkaline in nature and can neutralize acids.
03

Fill in the Blank

Given the information about the pH scale and the properties of bases, the correct word to fill in the blank is 'alkaline'.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

acidity
Acidity refers to the level of acid in a substance. This is measured using the pH scale, which ranges from 0 to 14. A pH value below 7 indicates an acidic solution. The lower the number, the stronger the acidity.
For example, lemon juice and vinegar are acidic because they have low pH values.
Some key properties of acids include:
  • Sour taste
  • The ability to turn blue litmus paper red
  • The ability to react with metals to produce hydrogen gas
Understanding acidity helps us explain many chemical reactions and the behavior of substances in different environments. The acid in our stomachs, for example, helps us digest food.
basicity
Basicity is the trait of being a base. A base has a pH value above 7 on the pH scale. The higher the number, the stronger the base. Bases are the opposite of acids, and they have their own unique characteristics.
For example, substances like baking soda and soap are basic because they have high pH values.
Some key properties of bases include:
  • Bitter taste
  • The ability to turn red litmus paper blue
  • Slippery feel when touched
Bases can also neutralize acids, which is why they're often used to counteract acidic substances. Understanding basicity helps us to handle and utilize bases properly in both everyday situations and scientific contexts.
alkaline
The term 'alkaline' is used to describe substances that have basic properties. Specifically, these are substances with a pH value greater than 7. When you hear the word 'alkaline', think of it as another word for 'basic'.
Alkaline substances include things like bleach and certain types of mineral water.
Remember these key points about alkaline substances:
  • They have a bitter taste and slippery feel
  • They can change red litmus paper to blue
  • They can neutralize acids to form water and salt
In everyday life, maintaining the balance between acidity and alkalinity is important. For instance, the human body needs a balanced pH level to function properly. The knowledge of alkaline properties helps in both chemistry and health-related contexts.

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Most popular questions from this chapter

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