Mr. Trott's Fantastic pH Review

Write the chemical equation for a base: Ba(OH)2

Ba(OH)2 --> Ba2+ + 2OH-

Which base gives a higher pH at the same concentration? Ba(OH)2 or NaOH

Ba(OH)2 because it gives more hydroxide ions (OH-) per molecule.

bases are _______ in universal indicator

Green to Purple

H+ + Cl- + Na+ + OH- =>

H2O + NaCl

HCl + NaOH =>

H2O + NaCl

Which acid gives a lower pH at the same concentration? H2SO4 or HCl

H2SO4 because it gives more hydrogen ions (H+) per molecule.

Write the chemical equation for an acid: HCl

HCl --> H+ + Cl-

List some common acids:

HCl, H2SO4, HBr, H2CO3, HI, HC2H3O2

List some common bases:

NaOH, KOH, Ca(OH)2, Ba(OH)2

acids are _______ in universal indicator

Red to Green

What is the H+ concentration of a pH = 6 solution?

[H+] = 1x10^(-6) M

Which is more acidic: [H+] = 1x10^(-7) or [H+] = 1x10^(-8)?

[H+] = 1x10^(-7): a larger value of [H+] is more acidic.

What is the H+ concentration of a pOH= 7.70 solution?

[H+] = 5.01x10^(-7)

Which is more acidic: [OH-] = 1x10^(-8) or [OH-] = 1x10^(-7)?

[OH+] = 1x10^(-8): a smaller value of [OH-] is more acidic.

Which is more acidic: [OH-] = 1x10^(-8) or [H+] = 1x10^(-8)

[OH-] = 1x10^(-8): [OH-] = 1x10^(-8) --> [H+] = 1x10^(-6), which is greater than [H+] = 1x10^(-8).

hydroxide ion

a hydrogen atom and an oxygen atom bonded together

hydrogen ions

a hydrogen atom without any electrons (a proton)

the pH scale

a measure of the free hydrogen ion concentration in the solution

pH of less than 7 is

acidic

acids are

any compound that increases the number of hydrogen ions (H+) when dissolved in water

bases are

any compound that increases the number of hydroxide ions (OH)- when dissolved in water

hydronium ions (H3O+)

are an alternative form of H+

pH of more than 7 is

basic

bases have a ______ flavour

bitter

Low pH

high acidity

high concentration of H+

high acidity

high pOH

high acidity

low concentration of OH-

high acidity

acids react with some metals to produce

hydrogen gas

HIGH pH

low acidity

low pOH

low acidity

pH of 7 is

neutral

What is the pH of a solution with an H+ concentration of 1x10^(-10) M?

pH = 10

What is the pH of a solution with a OH- concentration of 2x10^(-8) M?

pH = 6.30

Which is more acidic: pH = 7 or [H+] = 1x10^(-8)?

pH = 7: [H+] = 1x10^(-8) --> pH = 8, which is greater than pH 7.

Which is more acidic: pH = 7 or pH = 8?

pH = 7: lower pH

What is the pOH of a solution with a H+ concentration of 2x10^(-8) M?

pOH = 6.30

bases have a

slippery feel

acids have a _____ flavour

sour

neutralization reaction

the reaction between acids and bases

acid + base =>

water and "salt"