Lab 3 (Acids and Base)

Question 1

Acid

Answer 1

a molecule that can donate a proton (a hydrogen ion)

Question 2

Base

Answer 2

base releases hydroxide ions (OH-) when dissolved in water.

a substance that can accept protons (H+) or donate electrons

Question 3

What colors does litmus change to for acid and base

Answer 3

Blue litmus paper turns red in an ACIDIC solution,

Red litmus paper turns blue in a BASIC (alkaline) solution

Question 4

Taste of Acid and Base
and Texture

Answer 4

Acids are sour and base is bitter in taste.

Acid is corrosive, and base is slippery to touch

Question 5

Example of Strong Acid and Strong Base

Answer 5

Strong Acid: hydrochloric acid (HCl).

Strong Base: sodium hydroxide (NaOH).

Question 6

relationship between pH and hydrogen ion concentration

Answer 6

pH is a measure of the hydrogen ion concentration OR pH= -log[H+].

Question 7

Does the pH value increases or decreases when the concentration of hydrogen ion increases?

Answer 7

pH value decreases when the concentration of hydrogen ions [H +] increases

more hydrogen ions = lower pH = more acidic.

Question 8

Neutral, acidic and base pH according to scale

Answer 8

Acidic: 0-6
Neutral: 7
Base: 8-14

Question 9

What happens when you add a drop of acidic solution into water?

Answer 9

adding an acidic solution to water increases the concentration of hydrogen ions, making the solution more acidic and decreasing its pH

Question 10

what happens when you add a drop of acidic solution into buffer?

Answer 10

the pH of the buffer will decrease, but only slightly.

buffer resists change in pH, tries to maintain the pH of the solution

Question 11

What is a weak acid and weak base?

Answer 11

Weak Acid: An acid that only partially dissociates into ions when dissolved in water. This means that it doesn’t donate all of its hydrogen ions (H+) into the solution

Weak Base: When dissolved in water, does not completely ionize, meaning it doesn’t fully break down into hydroxide ions (OH-)