Acids & Bases

When the pH of a solution becomes more basic, the number on the pH scale

• decreases

• increases

• stays the same

• triples

What is the pH of a solution that results from the complete neutralization of an HCl solution with a KOH solution?

• 1

• 7

• 10

• 4

When an acid and a base are mixed, what is the reaction called?

• Neutralization

• Hydrolyzed

• Hydro Ionization

• A salt and a water reaction

Tags

NGSS.MS-PS1-5

What base has a pH of 8.5?

• Blood

• Soap

• Baking Soda

• Drain Cleaner

In a water solution, how do acids differ from bases?

• Acids form salts, but bases do not

• Acids turn litmus blue, while bases turn litmus red

• Acids form hydrogen ions (H+), while bases form hydroxide ions (OH-)

• Bases form salts, but acids do not

Marti took a balloon and filled it with 14 grams of baking soda. She then put 40 mL of vinegar into an empty water bottle. Marti stretched the balloon onto the top of the bottle and recorded the mass. She then flipped the balloon up so the baking soda fell into the vinegar. She observed it bubbling and could hear it fizzing. Marti laughed as the balloon filled with the carbon dioxide that was given off. After the reaction stopped, on the bottom of the bottle, Marti notices a white and clear substance. She remembers that she had learned that when you mix an acid (Vinegar) and a base (baking soda), you create

• acid and metal

• acid and base

• base and water

• salt and water

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which has a pH below 7?

• Acid

• Base

Turns litmus red

• Acids

• Bases

• All

What methods can you use to measure the pH of a solution?

• Observing color or clarity

• Measuring mass or volume

• Measuring density or electrical conductivity

• Using acid base-indicators or pH meters

Which pH value indicates the most basic solution?

• 7

• 8

• 3

• 11