Alkalinity & pH

Question 1

What does pH measure

Answer 1

Acidity or basicity of a solition

Question 2

How is pH determined

Answer 2

By the concentration of hydrogen ions

Question 3

What pH levels are acidic

Answer 3

Less than 7

Question 4

What pH levels are basic/alkaline

Answer 4

Greater than 7

Question 5

A pH of 7 is neutral, why?

Answer 5

Equal concentration of H+ and OH- ions

Question 6

Alkalinity measures..

Answer 6

A solutions capacity to neutralize acids

Question 7

Sources of alkalinity..

Answer 7

Carbonate (CaCO3), bio carbonate (HCO3-), hydroxide (OH-)

Question 8

Methods for measuring pH and alkalinity

Answer 8

Titration for alkalinity and pH meters for pH

Question 9

Titration

Answer 9

Solution of known concentration used to determine unknown concentration

Question 10

The pH scale is

Answer 10

Logarithmic

Question 11

What does the pH scale indicate

Answer 11

The activity of hydrogen ions in solution

Question 12

pH equation

Answer 12

pH=-log[H+]
Negative log of the activity of hydrogen

Question 13

[H+] is the..

Answer 13

Equilibrium molar concentration (mol/L) of H+ in the solution

Question 14

Acids

Answer 14

Donate protons (H+ ions) in aqueous solutions and increase H+ ions in water

Question 15

Bases

Answer 15

Accept protons (H+ ions) in aqueous solutions and increase concentration of OH- in water

Question 16

Examples of acids

Answer 16

Hydrochloric acid (HCl)
Acetic acid (CH3COOH)

Question 17

Examples of bases

Answer 17

Sodium hydroxide (NaOH)
Ammonia (NH3)

Question 18

Strength of an acid depends on

Answer 18

Ability to donate or accept protons

Question 19

pH of meteoric water

Answer 19

CO2(g) + H2O(l) = H2CO3(aq)
H2CO3(aq) = H+(aq) + HCO3-(aq)