Independent Practice: pH Pre-Lab

Oyster Grower:_____________________________________________

Period: ______________ Date: _________________ For questions 1-5 use the article titled “It's called ocean acidification, and it's killed oysters by the billions” 1. What event first led scientists to link low levels of ocean pH to oyster deaths?

2. What is the cause of oyster and shellfish deaths in the ocean (refer to the diagram at the end of the article)?

3. What are growers doing to make water less lethal?

4. Within the context of the article what do you think the term ‘vagaries’ means? Now look the word up – What does it actually mean?

5. Write a short paragraph that explains the central idea of the article. Use at least two details from the article to support your response.

For the following Questions use pages 42 - 43 in your biology text book. Define the following terms: 

Solution



Solvent



Solute



pH



Acid



Base



Buffer



Homeostasis (pg 16, 20, & 895)

What would be the relative concentration of H+ ions compared to OH- ions in a solution that has a pH of 2?

What would be the relative concentration of H+ ions compared to OH- ions in a solution that has a pH of 10?

Why is water neutral despite the production of Hydrogen ions and Hydroxide ions?

Classify these common household items as either acidic, basic, or neutral. Put an X into the appropriate box. Use your book and the internet to help you.

Item Bleach Vinegar Tomatoes Milk Soda

Acid

Base

Neutral

Item Ammonia Lemon juice Pure Water Bananas Gatorade

Acid

Base

Neutral