Indicators and Acid/Base Calculations

Based on the results of testing colorless solutions with indicators, which solution is most acidic?

• solution where bromthymol blue is blue

• solution where bromcresol green is blue

• solution where phenolphthalein is pink

• solution where methyl orange is red

Tags

NGSS.MS-PS1-2

In which solution will thymol blue indicator appear blue?

• 0.1 M CH₃COOH

• 0.1 M KOH

• 0.1 M HCl

• 0.1 M H₂SO₄

Three samples of the same solution are tested, each with a different indicator. All three indicators, bromthymol blue, thymol blue and bromcresol green appear blue if the pH of the solution is

• 4.7

• 6.0

• 7.8

• 9.9

Tags

NGSS.MS-PS1-2

KOH has a pOH of 3.0, what is the [OH^-]?

• 0.01 M

• 0.001 M

• 0.0001 M

• 0.1 M

What is the [OH-] if the [H+] is 1.0 x 10-3M?

• 1.0 x 10-3 M
• 6.02 x 10-23 M
• 1.0 x 10-14 M
• 1.0 x 10-11 M

What is the [OH-] if the pH is 4.9?

• 7.94 x 10-10 M

• 1.0 x 10-4 M

• 7.94 x 10-14 M

• 4.9 x 10-10 M

What is the pOH of a 1 x 10^-8 M solution of HNO₃?

• 8

• 6

• 7

• 9

the H in pH stands for

• hood

• happy

• hydrogen

• help

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic
• slightly acidic
• strongly basic
• slightly basic

Tags

NGSS.MS-PS1-2

KOH will release which ion?

• OH-
• H+
• OH+
• H-

Tags

NGSS.MS-PS1-2