Assignment on Acids and Bases in Solution

Hydrochloric acid (HCl) is combined with cesium hydroxide (CsOH) in a neutralization reaction. Which ions will combine to form a salt? Check all that apply.

Cl- Cs+

The human stomach is an extremely acidic environment. This allows the stomach to break down food so nutrients can be absorbed as it moves through the digestive system. Stomach acid is more acidic than lemon juice, which has a pH of around 2.0. Which could possibly be the pH of gastric acid?

1.2

Lea has just ordered a box of "universal" litmus paper. She dips one piece into vial A, and it turns green. She dips another piece into vial B, and it turns red. Which vial, A or B, contains a greater concentration of H+ ions? vial

B

Florian is testing some household supplies with red and blue litmus paper. The results are in the table below. What can he conclude about the pH of each sample?

Glass cleaner is basic. Aspirin is acidic. Sugar water is neutral.

Yasmin is testing an unknown solution to determine whether it is an acid or a base. She dips red litmus paper in the solution. It remains red. What can she conclude about the sample?

It is not a base.

You and your friend live in different states and plant identical hydrangea bulbs in your garden. When they bloom, you send each other pictures. You notice that even though you bought the exact same kind of plant, your hydrangea flowers are blue and your friend's are pink! On a hunch, you each measure the pH of your soil and find that your soil is a little acidic and your friend's is a little basic. Why do you think the flowers have different colors?

Sample Response: Since the hydrangeas are changing color depending on whether the soil is acidic or basic, they must have an indicator. This means that any hydrangea planted in acidic soil will have blue flowers and any hydrangea planted in basic soil will have pink. One common indicator present in many plants is anthocyanin, so maybe hydrangeas contain that chemical.

Sakura tested the pH of several solutions. Which substances are acidic? Check all that apply.

cola-flavored soda: 2.6 cranberry juice: 2.9 pickle juice: 5.5

In a neutralization reaction, there are two products: water and a ____.

salt