Acids and Alkalis Flashcards
(27 cards)
What is an acid?
A substance that donates protons (H+) in a solution.
What is an alkali?
A subset of bases that dissolve in water and release hydroxide ions (OH-).
True or False: Acids have a pH less than 7.
True.
What is the pH range of alkalis?
Alkalis have a pH greater than 7.
Fill in the blank: The reaction between an acid and a base is called ______.
neutralization.
What is the chemical formula for hydrochloric acid?
HCl.
Which indicator turns red in acidic solutions?
Litmus.
What is the general formula for acids?
HA, where H is hydrogen and A is the anion.
True or False: All acids are corrosive.
False.
Name one common household acid.
Vinegar (acetic acid).
What is a strong acid?
An acid that completely dissociates in water.
Give an example of a strong base.
Sodium hydroxide (NaOH).
What does a pH of 7 indicate?
Neutral solution.
True or False: Bases can taste bitter.
True.
What is the primary use of sodium bicarbonate?
As a mild antacid.
What is the process of adding an acid to a base to yield salt and water called?
Neutralization reaction.
What is the main characteristic of a weak acid?
It partially dissociates in solution.
Which acid is commonly used in car batteries?
Sulfuric acid (H2SO4).
What is an example of a natural alkali?
Baking soda (sodium bicarbonate).
Fill in the blank: The strength of an acid or base is measured on the ______ scale.
pH.
What color does phenolphthalein turn in a basic solution?
Pink.
True or False: All alkalis are bases, but not all bases are alkalis.
True.
What is the chemical formula for sulfuric acid?
H2SO4.
What is a neutralization reaction?
The reaction between an acid and a base to form salt and water.
