Acids and Buffers

life chemistry is based on ____

cells contain ____ water

TRUE or FALSE
Proper pH is essential to some living systems
True False

TRUE or FALSE
Maintaining proper pH is critical to survival of cells and biological systems
True False

It is a substance that breaks into [H+] ions in an aqueous solution

It is a substance that breaks into [OH-] ions in an aqueous solution

TRUE or FALSE
Aqueous solution is any solution where H2O is the solute
True False

Citric or Vinegar is an example of?

Give some examples of common acids

It has sour taste

One characteristic of acid is?

This may burn your skin

This  turns the pH paper meter(litmus paper) into red

Other Examples of acids are HCl and H2SO4  read as?

Soap, Ammonia and bleach are common ___

Give some common bases

This has a bitter taste

It can be poisonous and corrosive

It feels slippery

This can turn the litmus paper into blue

NaOH, KOH, NH3 read as _____ are other examples of bases

Three Definitions of Acids and Bases

Whose definitions states that an acid is a substance that when dissolved in water produces or increases the concentration of hydrogen ions

Whose definitions states that a base is a substance that when dissolved in water produces or increases the concentration of hydroxide ions

In Arrhenius definition it states that an _____is a substance that when dissolved in water produces or increases the concentration of hydrogen ions

In Arrhenius definition it states that a  base is a substance that when dissolved in water produces or increases the concentration of _____ ions

Their concept is based on the fact that acid-base reactions involve the transfer of H+ ions from one substance to another.

Whose definition states that an acid is a proton (H+) donor?

Whose definition states that a base is a proton (H+) acceptor?

In Bronsted-Lowry definition it states that an acid is a proton (H+) ____.

In Bronsted-Lowry definition it states that a ____ is a proton (H+) acceptor.

In Bronsted-Lowry ___ must have one ____ proton to donate

In Bronsted-Lowry base must have one ____ to accept a proton

The emphasis of Bronsted-Lowry concept is on _____

TRUE or FALSE
The emphasis of Bronsted-Lowry concept is on proton transfer, it also applies to reactions that do not occur in aqueous solution.

True False

Whose definition states that an acid accepts a pair of electrons?

Whose definition states that a base donates a pair of electrons?

In Lewis definition, ____ are electron pair acceptors

In Lewis definition, a base are electron pair ___

This definition is a more general definition than the the other definitions.

It is a substance capable of acting as either an acid or a base and can also donate or accept a proton

TRUE or FALSE
Water is an example of Amphiprotic and Amphoteric
True False

It is the particle formed that has received the proton.

It is the particle ;eft from the acid once it has donated the proton.

A substance that can act as either an acid or base.

An acid that has lots of water and small amount of acid

An acid that has lots of acid and not much water

An acid that releases lots of proton (H+)

An acid that releases fewer proton (H+)

It is the extent to which a compound is acidic or basic and is measured by the _____

In measuring acid strength, an indicator is needed. What are some examples of indicators?

It measures how acidic or basic a solution is

Acids have a pH from ____

Bases have a pH from ____

___ pH value indicates a stronger acid

Higher pH value indicates what?

It is a solution that resists changes in pH when small amounts of acids and bases are added

TRUE or FALSE
STRONG acids and STRONG bases completely dissociate in water and they create an equilibrium system
True False

TRUE or FALSE
WEAK acids and WEAK bases dissociate to a far LESSER degree and they create an equilibrium system
True False

An acid or base that differ only in the presence or absence of a proton are called

two formulas that differ by proton (H+) are called

it is a method of reporting hydrogen ion concentration

pH = -log[H+]