Chemistry Acid and Base

A solution has a pOH of 12. Which best describes the solution?

• It has a pH of 2 and is a base.

• It has a pH of 12 and is a base.

• It has a pH of 2 and is an acid.

• It has a pH of 12 and is an acid.

A student describes a liquid as feeling slippery. The student places red litmus paper into the liquid, and the paper turns blue. What can the student conclude

from these observations?

• The substance is likely a nonmetal

• The substance is likely a metal

• The substance is likely a base

• The substance is likely an acid.

Tags

NGSS.MS-PS1-2

An acid-base titration is represented by the chemical equation below.

CsOH (aq) + HBr (aq) → CsBr (aq) + H2O (l)

In the titration, 15.0 mL of CsOH solution is neutralized by 38.2 mL of 0.250 M HBr solution. What is the molarity of the CsOH solution

• 0.0982 M

• 0.637 M

• 1.36 M

• 10.2 M

Tags

NGSS.HS-PS1-7

A student conducts an experiment to identify the pH of some common household substances. The data is recorded in this table.

Which substance would be classified as containing the highest concentration of hydroxide ions?

• Ammonia

• Drain Cleaner

• Lemon Juice

• Vinegar

Tags

NGSS.MS-PS1-2

What type of solution is formed when solid sodium hydroxide (NaOH) is dissolved in water?

• an electrolytic solution, because NaOH will dissociate into ions

• an electrolytic solution, because NaOH will not dissociate into ions

• a nonelectrolytic solution, because NaOH will dissociate into ions

• a nonelectrolytic solution, because NaOH will not dissociate into ions

Why is KOH considered to be an Arrhenius base?

• It produces OH+ ions in solution.

• It produces H– ions in solution.

• It produces H+ ions in solution.

• It produces OH– ions in solution.

The chart below shows the characteristics of several common acid-base indicators.

Which indicator would appear to be yellow in a solution with a hydrogen ion concentration of 1.0 x 10^-7?

• Bromocresol Green

• Congo Red

• Phenol Red

• Indigo Carmine

Which substance can act as either an

acid or a base according to the

Brønsted-Lowry definition?

• H₃O⁺

• NH₄⁺

• HOH (H2O)

• HCl

• 1,67 M

• 1.25 M

• 0.600 M

• 0.450 M

Tags

NGSS.HS-PS1-7

Which is a characteristic of a strong

acid?

• It has a pH greater than 7.

• It completely ionizes in solution

• It contains many hydroxide ions.

• It reacts only with a strong base.