Acids Alkalis And Reactions Flashcards
What is a chemical reaction?
A process where reactants convert into products, involving the breaking and forming of bonds.
True or False: The pH scale measures the acidity or basicity of a solution.
True
What is the pH range for neutral solutions?
7
Fill in the blank: An acid has a pH value ______ than 7.
less
What is the pH of a strong base like sodium hydroxide (NaOH)?
Above 12
What does a pH of 0 indicate?
A highly acidic solution.
What is the formula to calculate pH?
pH = -log[H+]
True or False: The pH scale is logarithmic.
True
What is an example of a common weak acid?
Acetic acid (vinegar)
What is the role of indicators in pH testing?
Indicators change color based on the pH of the solution.
Fill in the blank: A solution with a pH of 14 is considered ______.
strongly basic
What does a lower pH value indicate about hydrogen ion concentration?
It indicates a higher concentration of hydrogen ions.
What is the pH of pure water?
7
True or False: pH can affect the rate of chemical reactions.
True
What is a buffer solution?
A solution that resists changes in pH when small amounts of acid or base are added.
What happens to the pH of a solution when an acid is added?
The pH decreases.
What is the significance of the pH scale in biological systems?
It is crucial for enzyme activity and metabolic processes.
Fill in the blank: A substance that increases the pH of a solution is called a ______.
base
What is the pH of lemon juice?
Approximately 2
True or False: Strong acids completely dissociate in water.
True
What type of reaction involves the transfer of hydrogen ions?
Acid-base reaction
What is a common use of pH testing in agriculture?
To determine soil acidity for optimal crop growth.
What is the effect of increasing temperature on the pH of water?
It generally decreases the pH slightly.
Fill in the blank: A solution with a pH of 8 is considered ______.
basic
