Calculating pH, pOH, H+ and OH- concentration

What is the equation for calculating pH?

• pH = [H⁺]

• pH = log [H⁺]

• pH = -log[OH^-]

• pH = -log [H⁺]

If the hydronium ion H₃O⁺ concentration is equal to the hydroxide ion OH^- concentration, the solution is a(n)

• acid

• base

• salt

• neutral solution

When an acid and base has been neutralized the pH will be?

• 1

• 4

• 7

• 10

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

If a solution has a [OH^-] of 2.3x10^-4, it must be a(n)...

• Acid

• Base

• Neutral

An acid

• is a substance that releases H+ ions when dissolved in water

• is a substance that does not release any ions when dissolved in water

• is a substance that releases OH- when dissolved in water

• releases an equal amount of OH- and H+ ions when dissolved in water

A solution has a pH of 7.0. What would happen to the pH if OH^- ions were added?

• pH would go up

• pH would go down

• pH would stay the same

• None of these

A solution has a pH of 7.0.  What would happen to the pH if H ions were added?

• pH would go up
• pH would go down
• pH would stay the same
• None of these

A  pH and a pOH will add up to:

• 0
• 7
• 14
• 1.0 x 10^-14

If the pH of a solution is 5.6 the pOH is

• 6.5
• 12.4
• 8.4
• 5.6

If the pH of a solution is 5 the [H+] is

• 1.0 x 10⁵  M
• 1.0 x 10⁹  M
• 5.0 x 10¹  M
• 1.0 x 10^-5  M