FEX-0.4-The pH Scale

Multiple Choice

Bellringer:

Which SI unit is used to measure time?

• K

• s

• mol

• N

Multiple Choice

Who introduced the concept of pH, and what does 'pH' stand for?

• Søren Sørensen, potential of hydrogen

• Marie Curie, power of hydrogen

• Albert Einstein, potential of helium

• Dmitri Mendeleev, potential of hydrogen

Multiple Choice

Which of the following best explains why the pH scale is considered logarithmic?

• Each whole number change represents a tenfold change in hydrogen ion concentration.

• Each whole number change represents a twofold change in hydrogen ion concentration.

• The pH scale is based on a linear relationship with hydrogen ion concentration.

• The pH scale only measures acids, not bases.

Open Ended

Describe two different methods for measuring pH and explain the advantages of each.

Multiple Choice

Which of the following substances is considered neutral according to the pH values shown?

• Lemon juice

• Vinegar

• Pure water

• Baking soda

Multiple Select

Select all the impacts that a decrease in ocean pH can have on the environment.

• Threatens coral reefs and marine ecosystems

• Improves water quality for drinking

• Makes it harder for organisms to form shells

• Increases soil fertility

Open Ended

What does the pH scale measure, and why is it important in our daily lives?