Calculating pH, pOH, and Ion Concentrations in Acids and Bases

What is the estimated pH value if the hydronium ion concentration is 2.5 x 10^-4 M?

• Between 5 and 6

• Between 3 and 4

• Between 4 and 5

• Between 2 and 3

If the pOH of a solution is 4.5, what is the pH at 25 degrees Celsius?

• 10.5

• 7.0

• 9.5

• 4.5

If the pH of a solution is 9.5, is the solution acidic, basic, or neutral?

• Basic

• Acidic

• Neutral

• Cannot be determined

How do you calculate the hydroxide ion concentration from pOH?

• 10 raised to the negative pOH

• 10 raised to the positive pOH

• pOH divided by 14

• Negative log of the pOH

What is the hydroxide concentration if the pOH is 3.8?

• 1.58 x 10^-6 M

• 1.58 x 10^-4 M

• 1.58 x 10^-5 M

• 1.58 x 10^-3 M

What is the pKa if the Ka of an acid is 1.8 x 10^-5?

• 3.745

• 5.745

• 4.745

• 6.745

What is the relationship between pKa and pKb?

• pKa + pKb = 14

• pKa - pKb = 14

• pKa / pKb = 14

• pKa x pKb = 14

What is the pOH if the hydronium ion concentration is 4.2 x 10^-3 M?

• 9.623

• 12.623

• 11.623

• 10.623

If the hydroxide concentration is 0.015 M, what is the pH of the solution?

• 13.176

• 12.176

• 11.176

• 14.176

How do you calculate the pH from the hydroxide concentration?

• pOH plus 14

• 14 plus the pOH

• pOH minus 14

• 14 minus the pOH