science revision v3 Acid & Alkali Flashcards
Acid and Alkali
\What is an acid?
A substance that donates protons (H+) and has a pH less than 7.
What is an alkali?
A base that dissolves in water and produces hydroxide ions (OH-), typically with a pH greater than 7.
True or False: All acids taste sour.
True
What is the pH range of acids?
0 to 6
What is the pH range of alkalis?
8 to 14
Fill in the blank: The neutral pH level is ___ .
7
Which indicator turns red in acidic solutions?
Litmus paper
What type of reaction occurs when an acid reacts with an alkali?
Neutralization reaction
What are the products of a neutralization reaction?
Salt and water
Name a common household acid.
Vinegar (acetic acid)
Name a common household alkali.
Baking soda (sodium bicarbonate)
What happens to pH when an acid is added to water?
The pH decreases.
What happens to pH when an alkali is added to water?
The pH increases.
True or False: Acids can conduct electricity.
True
What is a strong acid?
An acid that completely dissolves in water, such as sulfuric acid (H2SO4).
How does temperature affect the pH of a solution?
Increasing temperature can decrease the pH of pure water.
Fill in the blank: The process of adding an acid to a base to produce salt and water is called ___.
Neutralization
What does a pH of 14 indicate?
A strong alkali.
What is the primary use of litmus paper?
To test whether a solution is acidic or alkaline.
True or False: All acids are corrosive.
False
