Acid-base Equilibria

A chemist is working with a liquid substance that tastes bitter, feels slippery, and conducts an electric current. Which of the following is the chemist most likely working with? 

• a salt
• a base
• an acid
• distilled water

Which of these is a weak base?

• NH₃

• KOH

• HCOOH

• HBr

Tags

NGSS.HS-PS1-1

Which of these is a strong acid?

• NH₃

• CH₃COOH

• HClO₃

• HF

Which of the following describes H₂SO₄

• Weak acid

• Strong base

• Strong acid

• Weak base

A solution contains 0.04 M of a weak acid. Calculate the pH of the solution knowing that the K_a for the acid is 1.6 x 10^-7

• It is not possible to solve if the identity of the acid is not known

• 4.1

• 4.9

• Because the Ka is very small, the pH is close to neutral (about 6)

Which chemical is a proton acceptor?

• Acid

• Base

What is the pH of a 0.053 M solution of potassium hydroxide

• 6.91

• 12.72

• 7.33

• 1.28

A compound that donates H⁺ ions is 

• A Bronsted-Lowry Acid
• An Arrhenius Acid
• A Bronsted-Lowry Base
• An Arrhenius Base

Forms a OH- hydroxide ion

• Lewis Base
• Arrhenius Base
• Bronsted Lowry Base
• Bronsted Lowry Acid

Water can act as both an acid and a base in an ionization reaction to form H⁺ and OH^– ions. What is this phenomenon called?

• neutralization

• self-ionization

• base dissociation

• acid dissociation