acids and alkalis Flashcards
(21 cards)
What is an acid?
A substance that donates protons (H+) in a chemical reaction.
What is an alkali?
A type of base that dissolves in water, producing hydroxide ions (OH-).
True or False: Acids have a pH less than 7.
True
What is the pH range of alkalis?
The pH range of alkalis is greater than 7, typically up to 14.
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 indicator
What is the main characteristic of strong acids?
Strong acids completely dissociate in water.
Give an example of a weak base.
Ammonia (NH3)
True or False: All alkalis are bases, but not all bases are alkalis.
True
What is the common use of sulfuric acid?
It is commonly used in batteries and industrial processes.
What color does phenolphthalein turn in a basic solution?
Pink
What is the process of an acid reacting with a metal called?
Metal displacement or metal reaction.
Which acid is found in vinegar?
Acetic acid (CH3COOH)
What happens to pH when an acid is added to a solution?
The pH decreases.
What is a neutral solution?
A solution with a pH of 7.
What is the formula for sodium hydroxide, a common alkali?
NaOH
True or False: Acids can conduct electricity in solution.
True
What is the term for substances that change color depending on pH?
pH indicators
What is the effect of adding a base to an acidic solution?
It raises the pH and can neutralize the acid.
What is the main characteristic of weak acids?
Weak acids partially dissociate in water.
