The pH Scale
What does pH stand for?
Potential of Hydrogen
What do acids taste like?
Sour
Acid
What does an antacid do in your stomach?
Neutralizes excess acid
What happens when you mix an acid and a base together?
neutralization
What number on the pH scale represents a neutral substance?
7
What do bases usually feel like?
Slippery or soapy
Is milk slightly acidic, base, or neutral?
slightly acidic
Why do farmers add lime to soil?
To reduce acidity and balance pH
What gas is released when vinegar reacts with baking soda?
Carbon dioxide (CO2)
What type of substance has a pH less than 7?
Acid
Name one common acid found in your kitchen?
Lemon Juice or Vinegar
What is the appropriate pH of water?
7
What environmental problem happens when rain becomes too acidic?
acid rain
What happens to the pH when an acid and base neutralize each other?
moves closer to 7
What type of substance has a pH greater than 7?
Base
Name one common base used for cleaning?
Soap or Baking Soda
Which is more acidic -- soda or vinegar?
Why is it important for fish that lakes maintain a stable pH?
pH affects survival; too acidic can kill aquatic life
What products are usually formed when an acid and a base react?
salt and water
What is the pH range of most living cells in the human body?
Around 6.5-7.5
What type of ions do acids release in water?
Hydrogen ions (H+)
Which of these is basic: lemon juice, soap, or soda?
soap
What is the pH of human blood, and why must it stay constant?
about 7.4; to maintain proper body function
How does this week's experiment demonstrate real-world chemistry?
shows how everyday substances interact and balance pH like in digestion, cleaning, or the environment