pH

Question 1

What is acid?

Answer 1

A substance that produces H+ when it dissociates [breaks down].

Has more H+ ions than OH- ions.

Ex substances with a pH of 1 [essentially a substance with all H+ ions] has more H+ ions than those with a pH of 3.

Question 2

What is a neutral solution?

Answer 2

Same # of H+ as OH- .

Water [H–OH]

Question 3

What is the PH scale?

Answer 3

A numerical expression of the relative proportion of H+ ions or OH- ions in a solution.

Question 4

What is a neutralization reaction?

Answer 4

A reaction with the same # of H+ and OH-

HCL + NAOH&raquo_space; NACL + H2O

Question 5

What is a buffer?

Answer 5

Substances that minimize excess acidity or alkalinity. .

It does not neutralize a reaction

HCL [acid in digestion] + NAHCO3 [sodium bicarbonate/baking soda]&raquo_space; NACL + H2CO3 [weak acid-Carbonic acid&raquo_space; can dissociate into CO2 and H2O]

Question 6

What is base?

Answer 6

A substance that produces OH- when it dissociates [breaks down].

Has more OH- ions than H+ ions.

Ex substances with a pH of 1 [essentially a substance with all H+ ions] has more OH- ions than those with a pH of 10.