Unit 9 Test: Acids, Bases, pH (HC)

Acids form​ (a)   when mixed with water, and they taste ​ (b)   .

Bases form ​ (c)   when mixed with water, and they taste ​ (d)   .

• H+
• sour
• OH-
• bitter

Match the correct term with its definition

• Produce Oh- as the only negative ion

• Arrhenius Acid
• Produce H+ as the only positive ion

• Bronsted-Lowry Acid
• Proton donor

• Bronsted-Lowry Base
• Proton Acceptor

• Arrhenius Base

What gas is formed when an acid reacts with a carbonate compound?

• Hydrogen gas

• Carbon dioxide gas

• Water vapor

• Methane gas

Tags

NGSS.MS-PS1-5

What is the conjugate base in the following reaction? HC₂H₃O₂+ H₂O → H₃O⁺ + C₂H₃O₂^-

• HC₂H₃O₂

• H₂O

• H₃O⁺

• C₂H₃O₂^-

In the following reaction does water act like an acid or a base? CH₃NH₂+ H₂O → CH₃NH₃⁺ + OH^-

• acid

• base

• all of the above

• none of the above

The sum of the pH and the pOH of an aqueous solution always adds up to be

• 14

• 7

• 1

• 0

A solution is considered to be basic if the pH is

• 7

• below 7

• above 7

For a solution to be classified as basic, the

• [OH⁻] must be 1 x 10⁷ M

• [OH⁻] must equal the [H⁺]

• [OH⁻] must be 7 M or less

• [OH⁻] must be greater than the [H⁺]

A solution with a [H₃O⁺] of 1 x 10^-9 M would be classified as

• basic

• acidic

• neutral

What is the concentration of hydroxide ions in a neutral solution at 25°C?

• 1 x 10⁶ M

• 1 x 10⁻¹⁴ M

• 1 x 10⁻⁷ M

• More information is needed.