Hydrogen Ions and Acidity

pH balance is related to the equilibrium state of what kind of reaction?

• a precipitation reaction

• a combustion reaction

• a reversible reaction

• an allergic reaction

Which Danish chemist came up with the term "pH", but never explained his reasoning?

• Niels Bohr

• Hans Christian Ørsted

• Hans Christian Andersen

• Søren Sørensen

Which subatomic particle is pivotal to the behavior of acids and bases?

• the electron

• the proton

• the neutron

• the neutrino

You can think of pH as basically the power of ___

• hydrogen in a solution

• hydroxide in a mixture

• helium in an alloy

• heavy water

Water can function as an acid and as a base, by releasing and consuming ___

• alpha particles

• hydronium ions

• photons

• hydrogen ions

pH is mathematically defined as the "negative of the base ten logarithm of the ___"

• molar mass of protons

• concentration of hydrogen ions in solution

• mass of hydrogen ions in solution

• molarity of helium ions

If a solution has a concentration of hydrogen ions of 1 x 10^-5 mol/L, what is the pH of the solution?

• -5

• 1

• 5

• 10

What is the base ten logarithm of one hundred?

• 1

• 2

• 10

• 200

If your calculator has a 'log' button, that's just for ___

• natural logarithms

• binary calculations

• hexadecimal calculations

• base ten logs

When a hydrogen ion, or proton, attaches to a water molecule it forms ___

• a hydronium ion, H₃O⁺

• a hydroxide ion, OH^-

• a hydronium ion, OH^-

• a hydroxide ion, H₃O⁺