M1-M2: pH, buffer, buffer systems

69問 • 1年前

saoirse

通報

問題一覧

ACID OR BASE: These are substances that produce H3O+ ions in acqueous solutions.

acid

ACID OR BASE: They donate protons.

acid

ACID OR BASE: They produce OH- ions in acqueous solutions.

base

ACID OR BASE: They are proton acceptors.

base

How do you classify substances with pH of above 7?

base

How do you classify substances with pH of below 7?

acid

How do you classify substances with pH of 7?

neutral

Acids usually taste _________ while bases usually taste _________.

sour, bitter

Bases usually smell ___________ while acids usually causes the nose to ___________.

odorless, burn

Acids usually feel __________, while bases usually feel ___________.

sticky, slippery

When a blue litmus paper turns to red, how can the substance be classified?

acid

When a red litmus paper turns to blue, how can the substance be classified?

base

In a test that uses phenolphthalein, an indicator that it is basic is a color change to ______

pink

In a test that uses phenolphthalein, how can the substance be classified if it remains colorless?

acid

ACID, NEUTRAL, or BASE: Distilled water

neutral

ACID, NEUTRAL, or BASE: Cow’s milk

acid

ACID, NEUTRAL, or BASE: Ammonia solution

base

TRUE OR FALSE: The strength of an acid or base is not related to its concentration.

true

What ions are formed when strong acids readily react with water?

H3O+

What ions form when strong bases readily reacts with water?

OH-

Weak acids or bases are only _________ ionized in an acqueous solution.

partially

He defined acids as substances that contain a hydrogen atom and dissolve in water to form a hydrogen ion.

Arrhenius Svante

This definition was said to be limited and inaccurate because hydrogen ions do not exist in water; rather, hydronium ions are present.

The Arrhenius Definition

The Bronsted-Lowry definition states that substances that donate a proton are called ______ while substances that accepts a proton are called ______.

acids, bases

These can be charges of acid, according to the Bronsted-Lowry definition.

All off the above

Bases, according to the Bronsted-Lowry definition, can have either one of these charges.

Negative and neutral

This is what you call substances that can act as either an acid or a base.

amphiprotic

These are acids that can give up only one proton.

monoprotic

These are acids that can give up only two protons.

diprotic

Classify the given acid: HNO3

Monoprotic

Classify the given acid: H3PO4

Triprotic

This is a substance formed when an acid donates a proton to another molecule.

Conjugate base

This is a substance formed when a base accepts a proton from another molecule.

Conjugate acid

Give the conjugate base of the following acid: NH3

NH2-

Give the acid pair of this conjugate base: H2O

H3O+

TRUE OR FALSE: The strength of the acid/base is inversely proportional with the strength and reactivity of its conjugate acid/base.

true

TRUE OR FALSE: Bronsted-Lowry bases are also Lewis bases.

true

pH means:

Potential of Hydrogen

TRUE OR FALSE: The lower the pH value, the higher the corresponding concentration of H+

true

This is a scale which measures how acidic or basic a substance is.

pH scale

Type in the formula for finding the pH if the concentration is present.

-log of [H3O+]

Type in the formula for finding the pOH if the concentration is present:

-log of [OH-]

Type in the formula for finding the [H3O+] if the pH is present.

antilog of the -pH

Type in the formula for finding the [OH-] if the pOH is present.

antilog of the -pOH

What should be the number of decimal places for a pH value if the concentration is 3.5x10-3?

This is a substance that resists changes in pH.

buffer

A buffer is made up of a __________ or a base and its _________.

weak acid, salt

Which among the following are functions of a buffer?

All of the following

Buffer in both plasma and cells.

protein buffer

Most important protein buffer.

hemoglobin

Buffers renal tubules and intracellular fluids, providing a temporary solution.

phosphate buffer

The most important extracellular buffer.

carbonic acid-bicarbonate buffer

This physiological buffer regulates the blood levels of carbonic acid.

respiratory system

This physiological buffer is the most effective pH regulator.

renal system

TRUE OR FALSE: If kidney fails, pH balance will fail.

true

The acid-base balance in body fluids is one of the most vital aspects of what?

homeostasis

This acid-base balance disturbance is the build up of too much acid in the body.

acidosis

This acid-base balance disturbance is the build up of too much base in the body.

alkalosis

This disturbance is caused by an excessive loss of H3O+ from the blood.

Metabolic acidosis

This disturbance is caused by a buildup of CO2 in the blood due to poor lung function or depressed breathing.

Respiratory acidosis

This disturbance is caused by a loss of acid from the blood.

Metabolic alkalosis

This disturbance is caused by a low level of CO2 in the blood that results from rapid or deep breathing.

Respiratory alkalosis

It is an equilibrium constant for the ionization of an acid in aqueous solution to H3O+ and its conjugate base, also called as an acid dissociation constant.

acid ionization constant

The formula of pKa.

-log(Ka)

The weaker the acid, the smaller its Ka, the larger its pKa, and the higher its pH. The strength of the acid and its pH is:

inversely proportional

It is the amount of hydronium or hydroxide ions that a buffer can absorb without a significant change in its pH.

buffer capacity

TRUE OR FALSE: The greater the concentration of the weak acid and its conjugate base, the greater the buffer capacity.

true

The buffer can resist a pH change with added acid or base if its buffer capacity is more ______.

symmetrical

This equation calculates the pH of a buffer when the concentrations of the weak acid and its conjugate base are not equal.

Henderson-Hasselbach Equation

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問題一覧

ACID OR BASE: These are substances that produce H3O+ ions in acqueous solutions.

acid

ACID OR BASE: They donate protons.

acid

ACID OR BASE: They produce OH- ions in acqueous solutions.

base

ACID OR BASE: They are proton acceptors.

base

How do you classify substances with pH of above 7?

base

How do you classify substances with pH of below 7?

acid

How do you classify substances with pH of 7?

neutral

Acids usually taste _________ while bases usually taste _________.

sour, bitter

Bases usually smell ___________ while acids usually causes the nose to ___________.

odorless, burn

Acids usually feel __________, while bases usually feel ___________.

sticky, slippery

When a blue litmus paper turns to red, how can the substance be classified?

acid

When a red litmus paper turns to blue, how can the substance be classified?

base

In a test that uses phenolphthalein, an indicator that it is basic is a color change to ______

pink

In a test that uses phenolphthalein, how can the substance be classified if it remains colorless?

acid

ACID, NEUTRAL, or BASE: Distilled water

neutral

ACID, NEUTRAL, or BASE: Cow’s milk

acid

ACID, NEUTRAL, or BASE: Ammonia solution

base

TRUE OR FALSE: The strength of an acid or base is not related to its concentration.

true

What ions are formed when strong acids readily react with water?

H3O+

What ions form when strong bases readily reacts with water?

OH-

Weak acids or bases are only _________ ionized in an acqueous solution.

partially

He defined acids as substances that contain a hydrogen atom and dissolve in water to form a hydrogen ion.

Arrhenius Svante

This definition was said to be limited and inaccurate because hydrogen ions do not exist in water; rather, hydronium ions are present.

The Arrhenius Definition

The Bronsted-Lowry definition states that substances that donate a proton are called ______ while substances that accepts a proton are called ______.

acids, bases

These can be charges of acid, according to the Bronsted-Lowry definition.

All off the above

Bases, according to the Bronsted-Lowry definition, can have either one of these charges.

Negative and neutral

This is what you call substances that can act as either an acid or a base.

amphiprotic

These are acids that can give up only one proton.

monoprotic

These are acids that can give up only two protons.

diprotic

Classify the given acid: HNO3

Monoprotic

Classify the given acid: H3PO4

Triprotic

This is a substance formed when an acid donates a proton to another molecule.

Conjugate base

This is a substance formed when a base accepts a proton from another molecule.

Conjugate acid

Give the conjugate base of the following acid: NH3

NH2-

Give the acid pair of this conjugate base: H2O

H3O+

TRUE OR FALSE: The strength of the acid/base is inversely proportional with the strength and reactivity of its conjugate acid/base.

true

TRUE OR FALSE: Bronsted-Lowry bases are also Lewis bases.

true

pH means:

Potential of Hydrogen

TRUE OR FALSE: The lower the pH value, the higher the corresponding concentration of H+

true

This is a scale which measures how acidic or basic a substance is.

pH scale

Type in the formula for finding the pH if the concentration is present.

-log of [H3O+]

Type in the formula for finding the pOH if the concentration is present:

-log of [OH-]

Type in the formula for finding the [H3O+] if the pH is present.

antilog of the -pH

Type in the formula for finding the [OH-] if the pOH is present.

antilog of the -pOH

What should be the number of decimal places for a pH value if the concentration is 3.5x10-3?

This is a substance that resists changes in pH.

buffer

A buffer is made up of a __________ or a base and its _________.

weak acid, salt

Which among the following are functions of a buffer?

All of the following

Buffer in both plasma and cells.

protein buffer

Most important protein buffer.

hemoglobin

Buffers renal tubules and intracellular fluids, providing a temporary solution.

phosphate buffer

The most important extracellular buffer.

carbonic acid-bicarbonate buffer

This physiological buffer regulates the blood levels of carbonic acid.

respiratory system

This physiological buffer is the most effective pH regulator.

renal system

TRUE OR FALSE: If kidney fails, pH balance will fail.

true

The acid-base balance in body fluids is one of the most vital aspects of what?

homeostasis

This acid-base balance disturbance is the build up of too much acid in the body.

acidosis

This acid-base balance disturbance is the build up of too much base in the body.

alkalosis

This disturbance is caused by an excessive loss of H3O+ from the blood.

Metabolic acidosis

This disturbance is caused by a buildup of CO2 in the blood due to poor lung function or depressed breathing.

Respiratory acidosis

This disturbance is caused by a loss of acid from the blood.

Metabolic alkalosis

This disturbance is caused by a low level of CO2 in the blood that results from rapid or deep breathing.

Respiratory alkalosis

It is an equilibrium constant for the ionization of an acid in aqueous solution to H3O+ and its conjugate base, also called as an acid dissociation constant.

acid ionization constant

The formula of pKa.

-log(Ka)

The weaker the acid, the smaller its Ka, the larger its pKa, and the higher its pH. The strength of the acid and its pH is:

inversely proportional

It is the amount of hydronium or hydroxide ions that a buffer can absorb without a significant change in its pH.

buffer capacity

TRUE OR FALSE: The greater the concentration of the weak acid and its conjugate base, the greater the buffer capacity.

true

The buffer can resist a pH change with added acid or base if its buffer capacity is more ______.

symmetrical

This equation calculates the pH of a buffer when the concentrations of the weak acid and its conjugate base are not equal.

Henderson-Hasselbach Equation