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

I have a pOH have 4.23. Am I acidic or basic?

• Acidic
• Basic
• Neutral

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 of the following is an example of an acid anhydride.

• MgO
• Na₂O
• CO₂
• CaO

WHen 200 mL of 2.0 M NaOH(aq) is added to 500 mL of 1.0 M HCl(aq), the pH of the resulting mixture is closest to 

• 1.0
• 3.0
• 7.0
• 13.0

What is the pOH of a solution that has a pH of 2?

• 10
• 12
• 14
• 1

Which chemical is a proton acceptor?

• Acid

• Base