HS-PS1-11 Acids and Bases

What is the pH of a neutral solution at 25°C?

• 0

• 7

• 14

• 1

According to the Arrhenius definition, which of the following best describes an acid?

• A substance that accepts a proton in solution

• A substance that donates an electron pair

What is the molarity of a solution that contains 2 moles of solute dissolved in 500 mL of solution?

Tags

NGSS.HS-PS1-7

Which of the following indicators would be most appropriate to use when the expected endpoint of a titration is near pH 7?

• Methyl orange (range pH 3.1–4.4)

• Phenolphthalein (range pH 8.2–10.0)

• Bromothymol blue (range pH 6.0–7.6)

• Crystal violet (range pH 0.0–1.8)

According to the Brønsted-Lowry definition, a base is defined as a substance that:

Which of the following correctly represents the neutralization reaction between hydrochloric acid and sodium hydroxide?

A student measures the pH of four solutions and records the values as 2, 6, 9, and 13. Which solution is the most acidic?

• pH = 6

• pH = 9

• pH = 13

• pH = 2

• pH = 4, acidic

• pH = 4, basic

• pH = 10, acidic

• pH = 10, basic