Lab Quiz 4/17/14

Question 0

PH scale

Answer 0

The pH & pOH scales range from 0-14.

The pH of a solution + the pOH of that solution always equal 14.

A solution of pH=7 is neutral because the # of H & OH are equal.

Question 1

What is pH?

Answer 1

A measure of a solution’s acidity or alkalinity.

Specifically a measure of the hydrogen ion concentration in a solution

You can also find the pOH of a solution, the measure of hydroxide ion concentration

Question 2

What values are acidic?

Answer 2

pH lower than 7

More H ions than OH ions

Question 3

What values are basic/alkaline?

Answer 3

pH higher than 7

More OH ions than H ions

Question 4

What is the relationship between pH & H?

Answer 4

Inverse relationship

Acidic solution that has more H ions has Lower pH

Alkaline solution has less H ions has Higher pH

Question 5

Why is there an inverse relationship?

Answer 5

Because the numbers are so small you would have to express it in logorithms

Question 6

What is the difference between 2 adjacent pH values?

Answer 6

10 times the difference

Ex: between 2 & 3

.001 & .0001

Question 7

Define acid

Answer 7

A compound that increases the # of H ions in a solution

Aka: H donor

Question 8

Define base

Answer 8

A compound that decreases the # of H ions in a solution

Aka: H acceptor or recipient

Question 9

Define homeostasis

Answer 9

Maintenance of a stable internal environment

Question 10

Define acidosis

Answer 10

Low blood pH

Below 7.35

Question 11

Define alkalosis

Answer 11

High blood pH

pH above 7.45

Question 12

2 ways to keep pH constant value

Answer 12

1. Buffers

2. Respiration (specifically exhalation or expiration)

Question 13

How do buffers stabilize pH

Answer 13

Buffers resist change in pH of a solution.

Buffers bind to the excess H to increase pH or release H to reduce pH

Question 14

Examples of buffers

Answer 14

Sodium bicarbonate or carbonic acid

Albumin

Hemoglobin