Q: WHAT IS THE PH OF A NEUTRAL SOLUTION AT 25°C?

SEVEN. Pure water at 25 Celsius has equal H plus and OH minus concentrations, giving a pH of seven.

Q: WHO DEFINED ACIDS AS PROTON DONORS?

BRONSTED LOWRY. Bronsted and Lowry defined acids as proton donors and bases as proton acceptors in 1923.

Q: WHAT DOES A LOWER PKA INDICATE ABOUT AN ACID?

STRONGER ACID. Lower pKa means a larger Ka, so the acid dissociates more completely. That means it is a stronger acid.

Q: WHICH OF THESE IS A STRONG ACID?

HCL. Hydrochloric acid fully dissociates in water. Acetic acid and ammonium hydroxide are weak.

Q: WHAT IS THE CONJUGATE BASE OF SULFURIC ACID?

HSO4 MINUS. Sulfuric acid loses one proton to form hydrogen sulfate, its conjugate base. Loss of a second gives sulfate.

Q: A BUFFER IS MOST EFFECTIVE WHEN PH EQUALS WHAT?

PKA. Buffer capacity peaks when pH equals pKa. Concentrations of weak acid and conjugate base are equal.

Q: WHAT IS THE NORMAL PHYSIOLOGICAL BLOOD PH RANGE?

7.35 TO 7.45. Arterial blood pH is tightly regulated between 7.35 and 7.45. Outside this range causes acidosis or alkalosis.

Q: AT THE HALF EQUIVALENCE POINT IN A TITRATION, PH EQUALS?

PKA. At the half equivalence point, equal moles of weak acid and conjugate base exist, so pH equals pKa.

Q: ELEVATED ARTERIAL CO2 CAUSES BLOOD PH TO DO WHAT?

DECREASE. CO2 plus water shifts right to form H plus and bicarbonate. More H plus means lower pH. Respiratory acidosis.

Question 1

WHAT IS THE PH OF A NEUTRAL SOLUTION AT 25°C?

Accepted Answer

SEVEN

Question 2

WHO DEFINED ACIDS AS PROTON DONORS?

Accepted Answer

BRONSTED LOWRY

Question 3

A SUBSTANCE THAT DONATES A PROTON IS A ___ ACID.

Accepted Answer

BRONSTED

Question 4

WHAT DOES A LOWER PKA INDICATE ABOUT AN ACID?

Accepted Answer

STRONGER ACID

Question 5

A SOLUTION RESISTING PH CHANGE WHEN ACID OR BASE IS ADDED IS A ___.

Accepted Answer

BUFFER

Question 6

WHICH OF THESE IS A STRONG ACID?

Accepted Answer

HCL

Question 7

A SOLUTION WITH A PH BELOW SEVEN IS ___.

Accepted Answer

ACIDIC

Question 8

WHAT IS THE CONJUGATE BASE OF SULFURIC ACID?

Accepted Answer

HSO4 MINUS

Question 9

A BUFFER IS MOST EFFECTIVE WHEN PH EQUALS WHAT?

Accepted Answer

PKA

Question 10

AN ACID WITH MORE THAN ONE IONIZABLE PROTON IS ___.

Accepted Answer

POLYPROTIC

Question 11

WHAT IS THE NORMAL PHYSIOLOGICAL BLOOD PH RANGE?

Accepted Answer

7.35 TO 7.45

Question 12

THE PARTNER FORMED WHEN AN ACID LOSES H PLUS IS ITS ___ BASE.

Accepted Answer

CONJUGATE

Question 13

WHICH IS A LEWIS ACID BUT NOT A BRONSTED ACID?

Accepted Answer

BF3

Question 14

A SPECIES THAT CAN ACT AS BOTH ACID AND BASE IS ___.

Accepted Answer

AMPHOTERIC

Question 15

WHICH SALT FORMS A BASIC SOLUTION IN WATER?

Accepted Answer

SODIUM ACETATE

Question 16

AT THE HALF EQUIVALENCE POINT IN A TITRATION, PH EQUALS?

Accepted Answer

PKA

Question 17

THE BLOOD'S PRIMARY EXTRACELLULAR BUFFER IS THE ___ SYSTEM.

Accepted Answer

BICARBONATE

Question 18

WHICH INDICATOR TURNS PINK ABOVE PH 8.3?

Accepted Answer

PHENOLPHTHALEIN

Question 19

AT EQUIVALENCE OF A WEAK ACID + STRONG BASE TITRATION, PH IS?

Accepted Answer

ABOVE SEVEN

Question 20

WHAT IS THE PH OF A 0.01 MOLAR HCL SOLUTION?

Accepted Answer

TWO

Question 21

PH = PKA + LOG OF A MINUS OVER HA IS THE ___ EQUATION.

Accepted Answer

HENDERSON

Question 22

WHICH AMINO ACID HAS THE LOWEST ISOELECTRIC POINT?

Accepted Answer

ASPARTATE

Question 23

A MOLECULE WITH POSITIVE AND NEGATIVE CHARGES BUT NO NET CHARGE IS A ___.

Accepted Answer

ZWITTERION

Question 24

ELEVATED ARTERIAL CO2 CAUSES BLOOD PH TO DO WHAT?

Accepted Answer

DECREASE

Question 25

WHERE MOLES OF ADDED BASE EQUAL MOLES OF ACID IS THE ___ POINT.

Accepted Answer

EQUIVALENCE

ACID-BASE CHEMISTRY

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